Long Range Shooter

Benchmark’s two-groove .308″ Barrel

Lucas Beitner — Tue, 24 Jan 2012 03:11:31 +0000

Benchmark’s two-groove .308” barrel

The History

Rifle barrels with only two grooves are nothing new. As near as I can tell the Lee-Enfield was the first to employ two groove barrels (at least for high power rifle cartridges). They apparently conducted a test in May, of 1941, where they fired 500 rounds through a five groove and a two groove, accuracy testing with the barrel hot, and checking for fouling and barrel wear. The conclusion was that there was no significant difference in accuracy, fouling, or wear. The reason they went to the two groove was an apparent advantage in the ease and speed of manufacturing barrels with fewer lands and grooves. Remington later conducted some of its own testing with favorable results, showing accuracy equivalency at closer ranges and if anything. superior accuracy for the two-groove at longer range (see references). The Springfield 03-A3 apparently followed suit in using two groove barrels for the same reasons.

When rifling is made by pushing or pulling a button there is no cost or speed of manufacturing advantage with one rifling layout over another. In rim fire competition, there is believed to be an advantage in two groove barrels with respect to wind drift. Benchmark Barrels has been making two groove rim fire barrels for many years, and they’ve had great success, setting more than a few world records along the way. Ron Sinnema (owner of Benchmark) decided he wanted to try a two groove barrel for center fire rifles. So, he ordered a two groove button for .308” 1:10 twist. He thought there may be possible advantages in wind drift, fouling, or barrel wear. There also was a chance that it would not shoot well with only two grooves. The accuracy standards of aftermarket barrel manufacturers today are much more stringent than what the old Lee-Enfield military rifles were held to,. The fact that two groove barrels seemed to match the accuracy of the five groove barrels in British military tests is almost irrelevant.

The Build

The 2011 Oregon Sniper Challenge had been caliber restricted to 308 win, and 223 Rem. Ron and I had participated the previous year, but neither of us had 308’s (I‘ve had more than a few, but none at the time). I did have a 30 cal. 3 groove 1:11 twist Benchmark barrel I’d purchased a year before for a 300 win mag project that never came to fruition. I also had a Mark X commercial mauser action, a cracked CZ 750 stock that I planned to repair and re-inlet for the mauser action. I had a custom built detachable box magazine system made by Randy Ketchum (owner of Lynnwood Gun) that used Accuracy International long action magazines. Ron decided to pass on attempting to sign up for the match this year. I decided I would have the above components made into a 308 win. When I told Ron my plans he remembered that he’d made a two-groove barrel, and had yet to test one and see how it would work. It was then decided that my “odd duck” mauser project be used to test the two groove benchmark barrel. Coincidentally, all this happened 70 years after the Enfield test… to the month! This particular build was definitely not an ideal test platform, but with a trued action, good bedding, and a precise chamber job, we had no reason not to expect solid accuracy.

The actual build went faster than I could have expected. The barrel came out to a handy 23 inches. I went with a reasonably heavy custom contour we affectionately refer to as the “Jack Ass Contour”. It was designed by a buddy for long range “practical“ matches (we told him he should name it… he was joking, but the name stuck). It’s 1.250” for the first 5” it tapers to .900” at 14” and from there, it tapers to .780 at 30” (AKA: Stuurmans’ modified palma). The stock was repaired, the custom DBM was working great. I expected an accurate, functional, match rifle. I also expected the rifle to be a little schizophrenic in nature due to the hodge-podge of parts I collected for the build. This was not the case. The parts worked together almost flawlessly. The CZ 750 stock looks as if it was always meant for that action. It is an excellent design, very similar to the AICS which I’m very familiar with. For straight up ergonomics the CZ stock is better in some ways. The thumbhole is slightly more comfortable and placed farther from the trigger (one of the few issues I have with the AICS), the drop near the magazine well is deeper, and I prefer the feeling of textured composites over the plastic feel of the AICS. The cheek piece design and butt-pad are inferior to the AICS but I modified the butt-pad. Of course the AICS is much tougher, but the CZ stock is much lighter. The AICS mags used in my custom DBM stick just below the mag well, I’d rather be flush, but it works out very well and is easy to install and remove magazines. There are stops built in, so the magazine cannot rub against the bolt. The trigger sits farther back than would be ideal so I planned to modify the trigger shoe, but never got around to it. I was accustomed to it quickly anyway.

Field Testing

As soon as I got the rifle in my hands I got the load testing under way. I planned to use 155gr SMK Palma bullets and shoot them at a good clip (over 2800fps) with Winchester cases full of Varget, and CCI BR-2’s. I couldn’t find any 155 SMK’s locally but I did find Berger 155 VLD’s. I couldn’t (or wouldn’t) wait, so I started load development. I always run “Optimal Charge Weight” loads. The high OCW for this combo came out to 47.2gr of Varget. This netted me 2840fps in the 23” barrel. Accuracy testing put out groups between 1.25” to 1.6” at 300yds for 5 shots (prone off bi-pod). I was getting better accuracy with 175gr SMK’s over 42.5gr of Varget, but I was after the better ballistics offered by the light sleek 155gr bullets. I decided to try out a few 155gr Lapua Scenars I had collecting dust in the reloading room. With the same load of 47.2gr of Varget and the BR-2 primers accuracy improved. The rifle was now grouping between .8” and 1.25” in good conditions at 300yds (also prone/bi-pod). I was very pleased with these results. I double checked that I was still in the OCW and it was. I felt confident this load would shoot well in a wide variety of temperatures and conditions. The more we took this rifle out for long range testing the more confidence grew. It became obvious fairly quickly the rifle was excellent, the slight stress associated with “testing” wore away and “two-groove” became the punch line. “I told you two-grooves shoot great from improvised rests”…. “You probably don’t have to hold for wind at all with the… two-groove”…. “Heck no, I’m not going to clean it, it’s a two-groove. Remember?”

Not long after finding the above load I took the rifle to a long range match. The Big Wheels Steel Challenge would give me an opportunity to run the test rifle with “experimental” barrel out to 1300yds! Before the match I checked my drops out to 1330yds with Ron Sinnema and Chris Marti. Ron brought his 243 shooting the 115 DTAC’s and Chris brought a 7wsm shooting 168gr Berger VLD’s. There’s no arguing the superior wind drift of the 243 and the 7wsm, but we were all surprised by the 308’s accuracy at such distance. My particular load would be fully sub-sonic by the time it reached the rock we were shooting at. Even still the 308 was easily the most accurate of the three. We didn’t shoot at paper so I will not speculate on exact group size, but I can honestly say, I’ve never witnessed a 308 hold that kind of vertical dispersion beyond 1100yds. I’m sure some have achieved similar results with 210gr Berger VLD’s or 208gr A-max, but it was more than surprising from a 155gr bullet. At the Match (BSC) the rifle performed flawlessly all the way through. I managed to take 3rd place, and was the highest scoring 308 by a long ways. I managed to clean more than a few stages. The longest stage (1250yds and 1300yds) were dropped from the score but I did hit both targets (neither with first round). I don’t believe dropping the score on that stage would help or hurt enough to make a difference although I did out-score the match winner on that stage, a buddy who was shooting 115gr DTAC’s at just over 2900fps (also a Benchmark Barrel). Then came the Oregon Sniper Challenge. Things didn’t go so well at this match. The rifle shot great all the way though but my score on the first stage took the wind out of my sails to say the least. Although shooting a perfect score (200pts) shooter and spotter switched scores so I was awarded only 60pts. This would be fine had we suffered a communication issue (what they were apparently attempting to score), but unfortunately the shooter I was partnered with didn’t have a proper zero. The highlight of OSC for the rifle and I was the long range stage (800yds). We had to shoot 10 shots with no sighters at a silhouette. I had the 3rd highest score on the stage 85pts out of 100, the highest score was 89pts. I could have scored better but I hedged my bets by shooting the last 3 shots held progressively farther into the wind than what I felt was correct. If I’d have been wrong with my original wind call, it would have salvaged the stage and allowed me a few points where I may not have scored otherwise.

Breaking It Down

By now I have over 750 rounds through this two-groove 1:10 twist Benchmark Barrel. Does it work? Absolutely! I have been very impressed with this rifle from the beginning. So here’s my final analysis on the “two-groove”…..

-Accuracy

with two grooves: This rifle is very accurate. I would not expect any improvement in accuracy at any range with a more traditional 3-groove, 5-groove or what have you. I shot one group at just over 650yds that was just under 2.6” for 5 shots. Had I shot more that one group at that distance, I’m sure some would be better and some would be worse, but there’s no doubt the rifle consistently displays excellent accuracy. I’m still curious if the unusual long range subsonic accuracy I observed with this rifle could be attributed to the two-groove barrel.

-Wind drift

with two grooves: Unfortunately I have not seen any significant advantage in wind drift with the two-groove layout. The bullet drifts about what the drop chart says it will. I would guess that when a bullet is super-sonic the grooves cut into the bullet don’t effect bullet flight much, if at all. If one was to test this design subsonic, it may display the same advantages many observe in rim-fire.

-Fouling

with two grooves: This barrel has always been very easy to clean. Copper fouling is on par with other hand-lapped Benchmark’s I’ve owned (very little copper fouling). I will say that powder fouling does seem to be better with this design. When I entered the BSC match I already had over 200 rounds through it without cleaning. Looking down the barrel with the naked eye you’d never know it.

-Barrel Wear

with two grooves: Had we chambered the barrel in 300 Ultra Mag, we could have assessed barrel wear. But a 308 win is very easy on barrels as it is. I would not be supprised if barrel wear would be reduced by having less lands and grooves but I have no way of knowing conclusively either way at this time.

The ultimate question is, would I use a two-groove instead of three or five grooves. I honestly would. As did the British when testing the two-groove, I see no down side. They seem to powder foul less, the barrel may last longer, there is no degradation of accuracy, there may be advantages when shooting sub-sonic. So without a doubt I would use a two-groove again. The 1:10 twist is a little faster than I would choose for 155gr bullets but it worked perfectly. I think the 1:10 two-groove would be ideal for a custom 308’s and 30-06’s used for shooting heavy bullets over 200gr. I believe that would be the niche for this particular barrel (although with my results I’d run it in a 308 w/155’s too!) Ron believes the two-groove may be a little harder on bullet jackets so a 300 ultra mag shooting bullets at high MV’s may be better served by a 5r style rifling. I’ve always liked to use something a little different… You probably realized this when I described the custom Mauser that would become the test bed of the two-groove. I have a feeling though, that a few years from now the two-groove may not be nearly as “different” as it is now. I look forward to seeing the results of others with this design.

I want to Thank Ron Sinnema and the rest of the Benchmark crew for making this build possible. I also want to thank Randy Ketchum for an excellent custom DBM. Thanks to Jeff Gay and Steve Huisman for putting on some great matches. I had allot of fun with this rifle and will continue to enjoy it in the future.

By Lucas Beitner

References:

The Lee-Enfield Rifle”, Major E.G.B Reynolds

http://www.remingtonsociety.com/rsa/journals/two-groove

Target Cam

Sean Pomerinke — Mon, 25 Jul 2011 00:49:58 +0000

So, have you ever wondered why long range shooters like to shoot at steel so much? Yes there is something enticing about seeing your target react to your bullet, but there is a greater underlining reason. With steel, you have a way of telling that you have in fact hit the target. Now I know that there are a lot of companies out there that claim that their spotting/rifle scope can see a bullet hole at 1,000 yards. I have looked through a lot of scopes over the years, including Schmidt & Bender, Night Force and March Scopes. But I have yet to look through one that I have not had a hard time discerning exactly where the bullet hit or telling someone that they could easily do that unless they were shooting a 50 cal. Now what if I told you that there is a way you can see a bullet hole from a .243 at 1,000 yards. Not only during the day, but also see the bullet hole at NIGHT. Well, there is a way now! Mark Kuss, the developer of the Target Cam, has the solution. He has come up with a wireless camera and hand held monitor that can has a range of up to 1,000 yards. When Mark first contacted me the timing couldn’t have been better for me, I was just getting my new rifle back from my gunsmith. I had turned my Remington 300 Ultra Mag into a .338 and was going to need to develop my bullet drop all over again. Now, even though the timing was good for me, it was not good for mother nature yet as we had a slow start into spring. I guess that’s how the cookie crumbles sometimes. As I got chances to go out and shoot, I found it to be really handy not only at long distances but even during the load development stage. It doesn’t take long for it to be difficult to distinguish between your last shot and shots you made earlier. With the Target Cam and the dry erase pen you get, I could mark each shot on the screen and keep track of the earlier shots. It made it easier to track to your POA (Point of Aim) . I know some of you guys came here to hear about the distance stuff, so I started my first bullet drop testing at 500 yards. The setup is pretty simple, start by setting up your target and getting the camera set at the appropriate distance to the target and a bit off to one side. For obvious reasons, you don’t want your camera in front of your target and if you have to ask why, then you probably shouldn’t have a rifle anyway. Now after you get the camera setup, it’s time to setup the antenna. When I first attempted to get a signal, I had a hard time getting it to work much past 500 yards. I called Mark and he reminded me that it is a directional antenna and that it works best if you have two guys with radios or a cell phone ( one at the target and one at the FFP “field firing position” ) and adjust it to get the line of sight correct. Like anything else that sends a signal, it only works as good as the terrain/weather will allow. So keep that in mind when you are trying to setup your target in areas that have lots of brush or shrubs. So now that everything is setup, it’s time for my favorite part. Now for you guys out there that are as serious as a shooter as I am, I like to keep notes of just about everything. With a laptop you can connect your Target Cam monitor to your laptop and record your video, then take it home with you for review. So with a little help from my ballistic software to get me in the ball park, it was time to put the rubber-to-the-road and see how well the new gun and the new Target Cam were going to perform. Now in the video you’ll see my very first shot nail the bullseye which i’ll admit, there may have been some luck in that! Even if you had a scope that could see the bullet hole, there is no way you would’ve been able to see the bullet hole in the black and you would have

thought that you missed the target completely without getting closer to verify. All in all, I have to say I am pretty happy with how the gun and the Target Cam are doing. Even knowing exactly where the bullets holes went, I tried to spot them through my 24 power scope and it wasn’t going to happen. I even tried to see the bullet holes through my shooting partner Calib’s 32 power scope, no dice. So now that we’d broken the ice on the Target Cam, we wanted to see if it could get all the way out to 1,000 yards. We put up a fresh target and headed out.

Once we got out there, the signal did come in but was a bit in and out. Which is not surprising, as we did not make any adjustments to the antenna and it was very hot that day. The mirage was horrid. I am not sure if the mirage could interrupt the signal or not, but it wouldn’t surprise if it had. Now that we had done some daytime shooting it was time to see how it worked at night and it just so happens that my shooting partner has a .243 with a night vision scope on it. I have never shot at night before and it was a bit of a learning curve for me, but I did enjoy being able to shoot at 11:30 pm. The only problem we encountered was the the black circles we put on the target which disappeared through the night vision scope, so we had to do some guessing on where to hold.

So here is the true statement on the Target Cam; not only could we easily see the bullet holes from a .243, but it also allowed us to see them at night. So you hear all this and it sounds great but wait, there’s more. That monitor can handle up to 4 different cameras at once, in split screen or one at a time where you can switch through each camera. I took this out with my last class at the time of writing this. It was really nice being able to give instant and accurate corrections for students and if I had more cameras, that would just make things all that much better. Mark has 2 different models currently available for you to buy. The TC-100 which has a range up to 300 yards and the LR-1000 that has a range up to 1,000 yards. Now even though the LR-1000 is given a max range of 1,000 yards, we were able to squeeze a bit more out of it getting it out to 1,300 yards using taller pole on the antenna. You can find Mark and the Target Cam system at http://target-cam.com/ and for anyone that is serious about shooting long range, they would be very pleased with the target cam system as I am.

tokbox test

Sean Pomerinke — Fri, 08 Apr 2011 02:12:32 +0000

Long Range 201 Class May dates

Sean Pomerinke — Tue, 01 Feb 2011 01:11:16 +0000

Here are the dates for the next class. May 14 at 12:00 if there is anyone that lives close enough that would like to come. This is the next class the the Long Range Shooting class series. There will be a short class then the class room will break into two and half of the class will go shooting on Sat. and the second half will go shooting on Sun. Plan on bringing your rifle and at least 30 rounds. This class will get you to 500 yards and you must have taken the 101 first or get a hold of me to show me you have the knowledge to skip the 101 class. sean@longrangeshooter.com

HorusVision

Sean Pomerinke — Sun, 16 Jan 2011 01:57:49 +0000

Everyone that has used ballistic software in the past knows the steps that need to be taken in making that first round hit. You get your range finder out your Kestrel your PDA probably your note book so you can make that shot right the first time. Then one day someone puts it all together and now we have the the Kestrel 4500NV and ATrag Ballistics software together in one unit. Now with this unit your ballistic software gets your atmospheric conditions automatically with out the need to input the data manually. Humidity, Temperature, Station or Barometric pressure and Wind being updated in real time so that its ready before you are. Here is the press release on the new product that you will be seeing soon……………

HORUS BALLISTICS SOFTWARE AND KESTREL WEATHER TRACKER ARE NOWTOGETHER IN ONE UNIT

Horus Vision has teamed with Kestrel Weather Meters to introduce the Horus Kestrel, acompact ballistics instrument for long-range shooting.
SAN BRUNO, CA…Horus Vision, the leader of long-range shooting innovation, hasteamed up with Kestrel Weather Meters to introduce the breakthrough Horus Kestrel-the first device to incorporate weather (atmospherics) data directly into ballisticssolutions in real-time.
The relationship between Horus and Kestrel kindled as a response for the military’smission to obtain consolidated gear to minimize redundancy and bulk. All the powerof ATrag Ballistics is now integrated in the four-ounce pocket sized Kestrel WeatherTracker, eliminating the need for a separate piece of gear (which comes with a numberof accessories you would have to lug around, as well).
This integrated Kestrel 4500NV unit features five customizable targets, an extensivegun list, and Horus’ proprietary truing technology. This pairing is only offered in the4500 model as it is the only one that is capable of collecting wind direction – which iscrucial for long-range shooting. The Night Vision (NV) series is the preferred modelfor the military because of its dim red back light that does not obscure or bleach outyour natural vision in low light situations. The Horus Kestrel comes in two colors- OliveDrab and Desert Tan, and is IP67 and MIL-STD-810G Rugged. All compacted into ahand sized unit that takes two AAA batteries- no chargers, plugs, or over-sized energy sources.
Horus and Kestrel are prime candidates for this type of integration, because both arewell-known and highly respected in the military and government communities. Bothproducts have seen extensive action overseas and are relied upon in the daily lives ofthe sniper community. The Horus Kestrel will be available early in 2011, following SHOT Show, and will be available to purchase on both Horus Vision and Kestrel websites. Preliminary suggested price is around $739, the Horus Kestrel is less than a PDA with ATrag and Kestrel Combo.

About Horus Vision

Horus Vision provides cutting-edge technology to improve rifle accuracy at extended ranges, increasing the likelihood of a first-round hit. Horus products reduce the need for manual scope manipulation and mental calculation and incorporate sophisticated ballistics calculations. Our patented reticle replaces traditional mil-dot reticles. Horus technology and designs deliver simplified, systemized shooting that make expert skill possible and improve accuracy at any distance. Our hardware is combat-proven, meets military standards and can withstand the most rugged conditions. Horus Vision’s ballistics calculations were developed and refined by the former Chief of ARDEC’s small-arms division, William C. Davis. Horus Vision was founded in 2000 and is headquartered in San Bruno, California.

For more information about Horus Vision:

Contact Liz Hyman at (650) 588-8862 x1002

Liz@horusvision.com

www.horusvision.com

www.kestrelweather.com

Update Regarding Bergers .338 Hybrids

Sean Pomerinke — Fri, 13 Aug 2010 18:13:27 +0000

As expected, the release of the new 300 grain .338 Hybrid bullets has made quite a splash. The purpose of this bulletin is to share some facts that have been learned about this bullet since its release. There are two major facts that I’ll elaborate on.
1) The BC of the bullet is being revised, and
2) The bullet has limitations regarding its structural integrity.

Revised BC Assessment
For unknown reasons, the original BC test produced results that were not repeatable for this bullet. Upon releasing these bullets to the public, we started to hear that trajectories predicted with the advertised BC’s were not matching the observed drop. We took this feedback seriously, and performed several more careful BC tests. The results of each of these tests have produced a repeatable BC, but it’s lower than the original value by about 7%.

The revised BC’s for the 300 grain .338 Hybrid are:
G7 BC = 0.419
G1 BC = 0.818

The above BC’s have been measured in multiple tests in multiple barrels, and produce calculated trajectories that match the observations of some credible shooters.

We’re grateful for the feedback of the shooters who brought this matter to our attention and allowed us to correct the inaccurate information. Greater care will be taken with future tests in an effort to prevent this from happening again.

Limitations to the Bullet’s Structural Integrity
Another thing that happened when we released these bullets to the public is that they were fired in cartridges that are more energetic than the .338 Edge which I used for the initial evaluations. Upon exposure to the extreme pressures and accelerations produced by some of the larger cartridges, some negative results were observed; poor groups, and lower observed BC (even lower than the revised values above). Our current working theory is that the poor precision and reduced BC are a result of nose slump. Nose slump is when the bullet is accelerated so fast that the base of the nose can’t support its own weight, and bulges out to fill the barrel. This produces a bullet with a longer bearing surface and a shorter nose which explains the compromised BC. Since this deformation doesn’t occur exactly the same every time, poor precision also results.

The exact threshold of pressure/acceleration that will cause nose slump with this bullet is not known. There are a number of small to medium capacity cartridges that shoot these bullets very well, with extremely good precision and a repeatable BC. So far there have been no reported cases of nose slump with cartridges in the following class: .338 Winchester Mag, .338 Norma Mag, .338 RUM, and .338 Edge, etc.

The .338 Lapua Mag seems to be a borderline case which may or may not produce nose slump. Factors that affect pressure/acceleration will affect the likeliness of nose slump occurring. For example, ball powders are typically faster burning than stick powders, so they produce higher peak pressures, and are more likely to produce nose slump. Tighter bores can also cause elevated pressures and tip the scales toward nose slump.

Cartridges like the .338 Lapua Mag Improved and larger are virtually assured of producing nose slump when loaded to their potential pressures.

If you’re working up a load with these bullets and having difficulty finding a precise load, it’s likely that you’re exceeding the pressure threshold where nose slump happens. In small to medium cartridges, the hybrid ogive design makes it quite easy to find an accurate load. The bullet is quite insensitive to seating depth. If you’re working with a large capacity case and having poor results, you should consider reducing the powder charge until good groups are achieved.

When designing a bullet for use in hunting applications, the toughness of the bullet is always a trade-off. Terminally, you want a bullet that is capable of reliable expansion/fragmentation at low impact velocities. However, the bullet can’t be so thin-skinned that it doesn’t survive being launched at very high speeds. This being our first time working with a bullet this large, a construction was selected which we felt would strike the best balance between toughness and terminal performance. Simply put, we erred too much on the side of terminal performance. The result is a bullet that’s perfectly suited for small to medium capacity cases, but simply isn’t tough enough to survive being fired from the more energetic magnums.

The good news is that the situation has been identified and several solutions are already being worked on. We know the design needs to be ‘toughened up’ for successful use in larger cartridges, and we’re considering the best way to do this.

In Summary
The Berger .338 caliber 300 grain Hybrid bullet is still the highest BC bullet in its class. The performance gap just isn’t as big as originally thought.

In its current form, the bullet is perfectly suitable for many popular small to medium capacity cartridges. From my .338 Edge test rifle, I’ve shot multiple 10 shot groups at 1000 yards under 10” and the bullets performed with a very repeatable BC. For the time being, those with larger capacity cartridges will have to wait for the bullet to be toughened up in order to achieve good performance. We don’t have an anticipated timeline for this revision, but it is a top priority.

On a personal note, I want to express my gratitude for the shooters who’ve provided the critical feedback which helped us to understand the situation enough to take action. Having an open dialogue and exchange of information is the best way to ensure we’re doing everything we can to make the best bullets possible.

http://02b0516.netsolhost.com/blog1/?p=133

How to use Minute of Angle “MOA” for Long Range Shooting

Sean Pomerinke — Wed, 21 Jul 2010 19:19:12 +0000

Berger Bullets NEW 338 300gr Hybrid

Sean Pomerinke — Wed, 12 May 2010 03:20:39 +0000

I have been waiting a long time for Berger to release this bullet and it is now possible to purchase. I am not spending a lot of time on this post but I wanted to
get it out there for everyone to see.

Interview with Carlos Hathcock “White Feather”

Sean Pomerinke — Tue, 27 Apr 2010 02:28:27 +0000

This is a video that I came across of a Interview of Carlos Hathcock.
He was a sniper in the Vietnam War and later help setup the sniper schools that we use today. He has won numerous competitions including the Wimbledon cup and held the longest recorded kill in 1967 of 2,286 meters (2,500 yards, or 1.42 miles) until it was beat by Arron Perry and then Rob Furlong’s record of 2,430 meters (2,657 yd / 1.509 miles)

How to use your scope

Sean Pomerinke — Wed, 21 Apr 2010 01:14:27 +0000