Could you hit a buffalo at 1.27 miles (2240 yards) … with iron sights? Impossible as that may seem, that’s exactly what Ernie Jimenez did last month at the North Springs Shooting Range in Price, Utah (elevation 5,627′). Shooting a milsurp Swiss K31 rifle chambered for the 7.5×55 Swiss round, Jimenez placed four hits on a three-foot-high, bison-shaped steel target placed a staggering 2240 yards from the firing line. Not bad for a rifle which Jimenez acquired many years ago for just $99.00. Of course he did have plenty of misses along the way (and Ernie even managed to hit the plate shielding his camera).
This video is set to start half-way through, when the shooter starts making hits:
This week, the U.S. Army Marksmanship Unit is pleased to host pistol teams from the various U.S. Armed Services in the 56th Annual Interservice Pistol Championship. Our Handloading Shop members have enjoyed discussing pistol accuracy and enjoying the camaraderie of competitive shooters from all over. In that spirit, this week’s topic will focus on handloading for best pistol accuracy, rather than our usual rifle-oriented information.
Optimize the Taper Crimp
One often-overlooked aspect of handloading highly-accurate pistol ammunition is the amount of crimp and its effect on accuracy. Different amounts of taper crimp are used with various handloads to obtain best accuracy. The amount is based on bullet weight, powder burn rate and charge, plus other factors. It is not unusual for our Shop to vary a load’s crimp in degrees of 0.001″ and re-test for finest accuracy.
Berger Bullets has just announced a new 6.5 mm (.264 caliber) 130gr Hybrid projectile. Optimized for magazine-length seating (and AR10-friendly), the new 130gr bullets should be ideal for tactical comps and the PRS series. We expect this new bullet to work great when loaded in modern mid-size cartridges such as the 6.5×47 Lapua and 6.5 Creedmoor. Berger’s new 6.5mm 130gr Match AR Hybrid OTM Tactical bullet (could Berger come up with a longer name?) will soon be released to the public. Berger says this new 130-grainer is the first of many new bullet designs to be introduced in the next few years. Here is a run-down on the new bullet from its designer, Bryan Litz of Applied Ballistics.
NEW 130gr Hybrid — Behind the Design
by Bryan Litz, Berger Chief Ballistician
Intelligent bullet design and selection begins with an understanding of application constraints. For bullets that will be used in unlimited rifles, there are few constraints and performance can truly be maximized. However, many shooting applications have realistic constraints such as magazine feeding of loaded rounds. In constrained applications, you need to ask the question: “What’s the best bullet that will work within the constraints of my shooting application?”
The new Berger 6.5mm 130 grain AR Hybrid OTM Tactical bullet is specifically optimized for maximum performance in magazine-length ammo.
6.5mm cartridges are the second most common cartridges used by top shooters in many of the Precision Rifle Series (PRS) matches, with 6mm being the most common. These kinds of tactical matches all have stages that require repeating rifles — either AR-10 platforms or bolt guns — so magazine feeding is a must. Recognizing that Berger did not have an option that was truly optimized for this particular application, we went to work and the latest 6.5mm Hybrid is the result.
SUMMARY
The new Berger 6.5mm 130 grain AR Hybrid OTM Tactical bullet is specifically optimized for use in loaded ammo with COAL constraints for magazine feeding. This bullet maximizes overall performance through BC as well as achievable muzzle velocity in mid-capacity 6.5mm cartridges fed from AR-length magazines.
What makes this bullet optimal for magazine length ammo? To start with, the nose of the bullet is constrained in length so that when it’s loaded to mag length in 6.5mm cartridges such as the 6.5mm Creedmoor, 260 Remington and 6.5×47 Lapua, the nose of the bullet won’t be pushed below the case mouth. This can be an issue with some of the heavier 6.5mm bullets like the 140s. Furthermore, the hybrid ogive design is not sensitive to jump distance like some other designs such as the VLD.
Another consideration of length-constrained ammo is how much of the bullet is pushed down into the case. The inside of the case is for powder, and the more space you take up with bullet, the less powder you can fit in. Less powder means less total energy available, and muzzle velocity is depressed. A bullet weight of 130 grains is an optimal balance between external ballistic performance (BC) and internal case capacity considerations which translate into muzzle velocity. Further to this objective, the AR Hybrid has a minimal air gap in the front of the nose, which allows the bullet to have an even shorter OAL. When dealing with length-constrained designs, you need to pack as much bullet into as little length as possible< to optimize overall performance. Another advantage of making the bullet shorter is that stability, including transonic stability, is improved.
Although this design is length-constrained, the combination of a hybrid ogive and 7 degree Boat Tail produce a very respectable G7 form factor of 0.920 which is within 1% of the popular 6mm 105 grain Hybrid. See below for full live fire ballistic performance data.
The 6.5mm 130 grain AR Hybrid will be barely stable from a 1:9″ twist, and reaches full stability from a 1:8″ twist which is common for many 6.5mm rifles. Visit the Berger Bullets twist rate calculator to get more detailed stability information on your specific barrel twist, muzzle velocity and environment.
Cartridge Selection for Magazine Length Constraint — Advanced Analysis
The trend to smaller calibers in magazine-fed rifles is happening for a very good reason. For a .308 Winchester round, you only have 2.37 calibers of nose length available for the bullet to protrude from the case. Such a short nose will have relatively high drag for the caliber. By contrast, smaller calibers such as 6.5mm and 6mm have proportionally more length available for the nose to protrude from the case and still fit in the same COAL constraint. Proportionally longer noses mean lower drag. Proportionally longer bullets mean higher sectional density. Combine an elevated sectional density with lower drag, and you get higher BC bullets. For example, consider a 175 grain .30 caliber bullet commonly used in .308 Winchester M118LR-type ammo. These 175 grain bullets have G7 BCs in the neighborhood of .243 to .260. Neck the .308 down to 6.5mm (260 Remington) or 6mm (.243 Winchester) and now look at the BCs of the bullets available in these calibers which work within the same magazine length constraint. The 6.5mm 130 grain AR Hybrid has a G7 BC of 0.290, and the 6mm 105 grain Hybrid has a G7 BC of 0.278 — both of which are higher than the .30 cal 175 grain bullet BC. Furthermore, you get hundreds of feet per second more velocity with the necked-down cartridges as well.
All of the above translates into higher hit percentage. See the caliber comparison chart below* which is an excerpt taken from the book: Modern Advancements in Long Range Shooting which addresses this and many other topics in even more detail.
*The Weapon Employment Zone (WEZ) analysis shown above is for a 1000-yard shot on a standard IPSC silhouette in an uncertain environment having: +/- 2 mph wind, +/- 1 yard range, Muzzle Velocity SD of 10 fps, and a rifle shooting 1 MOA groups.
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In our Shooters’ Forum, a member recently noted that he needed to pull down (disassemble) some ammunition that was loaded incorrectly by one of his shooting buddies. You can use an impact puller to do this task, but if you have more than a dozen rounds or so, you may prefer to use a collet-style bullet puller. These work very quickly and positively, making quick work of big jobs. The efficiency of the collet-style puller is worth the investment if you frequently disassemble ammo. These devices retail for under $25.00 (collets sold separately). Normally, you’ll need a specific collet for each bullet diameter. But collets are not that costly, so this isn’t a big deal, particularly if you only load a few calibers, such as .223, 6mm, and .308.
Hornady and RCBS use different mechanisms to tighten the collet around the bullet. On Hornady’s Cam-Lock Bullet Puller, a lever-arm on the top of the bullet puller serves to tighten the collet around the bullet. Simply rotate the lever from the vertical to the horizontal position to grab the bullet. Lower the ram to remove the case. The bullet will drop out when you return the lever arm to the vertical position. This is demonstrated in the video below:
Remington Outdoor Company (“ROC”), is shaking up its leadership — starting at the top. Effective immediately, Jim (“Marco”) Marcotuli has been appointed President and Chief Executive Officer (CEO), replacing George Kollitides II, who served as Chairman and CEO. Board member James P. (“Jim”) Campbell has been appointed Vice Chairman of the Board. Mr. Marcotuli will also serve as interim Chairman of the Board. Additionally, ROC’s Chief Financial Officer Ron Kolka is retiring but will remain with the Company for the next 30 days. Also leaving ROC are former Directors Walter (“Wally”) McLallen and James J. Pike.
Jim Shepherd of the Shooting Wire says the shake-up at Remington stems, at least in part, from ROC’s recent struggles with product recalls and class actions: “Having spoken with several top execs in other gun companies, this latest move is being viewed as the company’s attempt to move past some stormy recent history. That, however, might be easier said than done as two significant class actions still loom on the horizon and the calamitous recall of Model 700 rifles [still eats] into cash flows. Shepherd also suggests that former Chairman and CEO Kollitides was eased out: “In most financial circles, that abrupt departure would be called ‘he got quit’.’
About the New CEO, Jim “Marco” Marcotuli
Mr. Marcotuli has 25 years of management and operations experience, most recently serving as President and CEO of North American Bus Industries (NABI), where he successfully boosted the company’s market share while significantly growing earnings and revenue. Prior to that position, Mr. Marcotuli held senior leadership roles at various companies, predominately in the aerospace and automotive industries. “Over the past nine months Marco has distinguished himself as a visionary operator and remarkably effective change agent who has driven measurable results across our organization,” said Rob McCanna, senior vice president of sales at ROC. Said Mr. Marcotuli: “I am honored to have the opportunity to help write the next chapter for our Company and to work with our entire team to deliver consistently superior quality and excellence across the enterprise.”
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The U.S. Department of State has proposed new Federal Rules which could severely restrict the exchange of information about firearms, gunsmithing, and reloading on websites and in internet forums. Draconian penalties could be imposed on websites such as AccurateShooter.com. Restrictions on dissemination of “technical data” could impact reloading forums, and perhaps even block the publishing of gunsmithing information in print and on the internet.
Steve Johnson, Editor of The Firearm Blog (TFB), writes: “The State Department is considering expanding rules to prevent U.S. manufacturers, or U.S. citizens, from publishing unclassified technical information relating to the manufacture of any weapons, including firearms and ammunition. If the information is distributed in any way that a non-citizen could access it (which essentially means any transmission of the information to the general public even if the information never leaves the USA) it would need to be first cleared first by the State Department. Publishing includes, but [is] not limited to, blog posts, posting comments on blogs, gun forums, in books, on DVDs and on Youtube. This could spell the end of TFB, other non-political guns blogs, reduce the type of content gun magazines would publish, [and] prevent the publication of books on gunsmithing[.]” Read TFB Article.
Any experienced varmint hunter knows the value of a good .17 HMR rifle, particular when used inside 150 yards on small critters such as ground squirrels. The .17 HMR is a great round, but for general plinking and target practice, we prefer shooting the venerable .22 Long Rifle. The .22 LR has less recoil and less noise. Importantly, .22 LR ammo (even with today’s shortages) remains much less expensive than .17 HMR ammunition.
Wouldn’t it be great if a single, affordable varmint rifle could shoot both .22 LR and .17 HMR? Well, CZ offers just such a rig — the CZ Model 455 American Combo, a versatile switch-caliber rifle priced at about $485.00 (MSRP is $531.00). The American Combo comes complete with both .22 LR and .17 HMR barrels, easily interchanged with a simple Allen wrench. As CZ explains: “The CZ 455 eliminates the need to spend the extra expense on a second rifle when you want to add another quality shooter to your rimfire battery”. For a bit more money, you can even purchase a .22 WMR barrel, making your CZ a triple-threat varmint-slayer.
Father’s Day is June 21, 2015, less than a week away. If your father enjoys the shooting sports, here are some recommended items that every shooter can use. All selections cost less than $100.00. It’s not too late to order. If you have an Amazon Prime membership, you can get two-day shipping in most areas of the country. For non-Prime members, most items will ship in 3-4 days. That’s enough time to get the gift to “Pops” by next Sunday.
The light-weight, compact RCBS Partner Press is ideal for loading at the range. It can easily be mounted to a bench with C-Clamps.
30th Annual FCSA Championship Coming Soon
The 30th Annual FCSA 1000/600 Yard World Championship will be held July 3 through 5, 2015 at the Whittington Center in Raton, New Mexico. CLICK HERE to REGISTER.
By James Patterson This article first appeared in Sinclair International’sReloading Press Blog
For a number of years I drooled over every .50 BMG caliber rifle that I came across, I read every article I could find and determined that ‘Someday’ I was going to have one. Well I finally took the plunge and in 2002 I purchased my first ‘Big 50’. Almost immediately I joined the Fifty Caliber Shooters Association (FCSA) and I have since come to immensely enjoy shooting this challenging cartridge and associating with some of the best people on earth.
Varmint hunters rejoice. At long last Hornady-brand 17 WSM (Winchester Super Magnum Rimfire) ammo is available. In case you haven’t heard by now, the 17 WSM is the fastest rimfire cartridge ever created. With muzzle velocities in the 3000 fps range, the 17 WSM enjoys a considerable advantage over even the hottest 17 HMR rounds you can buy. Winchester has produced its own 17 WSM ammo, but that was hard to find. Now Hornady is producing 17 WSM ammo loaded with 20gr V-Max tipped bullets. Grafs.com has the new Hornady ammo in-stock now at $15.99 per box of 50 rounds. Order soon if you want some. We expect this stuff to go very quickly…
You never want your barrel to get too hot. Accuracy suffers when barrels over-heat, and excessive heat is not good for barrel life. So how do you monitor your barrel’s temperature? You can check if the barrel is “warm to the touch” — but that method is not particularly precise. There is a better way — using temperature-sensitive strips. McMaster.com (a large industrial supply house) offers stick-on temp strips with values from 86° F to 140° F. A pack of ten (10) of these strips (item 59535K13) costs $10.71. So figure it’ll cost you about a buck per barrel for strips. That’s cheap insurance for your precious barrels.
The CMP’s New Talladega Marksmanship Park in Alabama offically opened this weekend. On hand for the opening ceremonies were Alabama Governor Robert Bentley and Congressman Mike Rogers. Joining in the initial competition, Rep. Rogers fired an M1 Garand from the bench.
500-acre Facility Cost Nearly $20 Million to Complete
The new facility features 500 acres of Rifle and Pistol ranges, along with Trap and Sporting Clays fields. The main rifle range boasts state-of-the-art electronic targets at 200, 300, and 600 yards. Chief Operating Officer Mark Johnson said workers completed construction on time and the project came in under the original $20-million budget.
Proportionally longer noses mean lower drag. Proportionally longer bullets mean higher sectional density. Combine an elevated sectional density with lower drag, and you get higher BC bullets. For example, consider a 175 grain .30 caliber bullet commonly used in .308 Winchester M118LR-type ammo. These 175 grain bullets have G7 BCs in the neighborhood of .243 to .260. Neck the .308 down to 6.5mm (260 Remington) or 6mm (.243 Winchester) and now look at the BCs of the bullets available in these calibers which work within the same magazine length constraint. The 6.5mm 130 grain AR Hybrid has a G7 BC of 0.290, and the 6mm 105 grain Hybrid has a G7 BC of 0.278 — both of which are higher than the .30 cal 175 grain bullet BC. Furthermore, you get hundreds of feet per second more velocity with the necked-down cartridges as well.
