![]() The Berger and Sierra 90-grain bullets are too long to stabilize in a 1:8 twist and are shown for reference only. NOTE: All loads with bullets up to 80 grains delivered sub-MOA, five-shot accuracy in the Les Baer Super Varmint with most averaging either close to or less than half an inch at 100 yards. And yet the 1:12 twist is not too quick to deliver excellent accuracy with various 40-grain bullets. This is a good compromise since it is quick enough to stabilize the long 60-grain Nosler Partition and Hornady softnose bullets of the same weight as well as those weighing a tad more, with the 62- and 64-grain bullets from Berger being excellent examples. 223 Remington has a rifling twist rate of 1:12 inches. This prompted the Army to switch to a slightly faster 1:12-inch twist, and then later when the 62-grain SS109/M855 bullet was adopted the specified twist became an even faster 1:7 inches. While that was quick enough to stabilize 55-grain bullets at what we consider normal ambient temperatures, bullets became unstable when the mercury plummeted well below 32 degrees Fahrenheit. The first M16 rifles built by Colt many years ago had barrels with a rifling twist rate of 1:14 inches. I also know a few groundhog shooters who shoot the heavy match bullets in quick-twist rifles. For starters, handloads put together haphazardly are good for making noise, but when it comes to ammo for feeding a super-accurate AR you need the best available in order to realize its full accuracy potential.Įven heavier match-grade bullets, such as the Sierra MatchKing, Berger VLD, and Hornady A-Max, are commonly used for long-range competitive shooting, most commonly out to 600 yards but more and more frequently out to 1000 yards. But some effort is required on the shooter's part in order for this to happen. The Super Varmint from Les Baer Custom I recently shot is an excellent example of how accurate a really good AR15 can be. When handloading for the AR15, a relatively quick burning powder such as Reloder 7 (L) is ideal for bullets weighing up to 55 grains, and a slower burning powder like Reloder 15 (R) is more suitable for heavyweight bullets. But as hundreds of shooters have proven time and again through the years, when top-quality component parts are assembled with great care the AR15 will deliver accuracy once thought possible only with the bolt-action rifle. I mean, a rifle that looks like something out of the pick and shovel section of a hardware store should not be this accurate. The AR15 magazine accepts cartridges loaded to overall lengths up to 2.275 inches longer handloads must be fired single shot. To me, this is remarkable considering the fact that it was designed for use on the battlefield rather than at the target range. When fed decent ammunition a really good AR will keep five bullets inside half an inch at 100 yards with boring regularity. I was impressed with the performance of those rifles back then, and I am even more impressed with the accuracy of top-level AR15 rifles being built today. Not too many years ago I spent a bit of my time shooting super-accurate bolt guns chambered to 6mm BR Remington and 6mm PPC in registered benchrest competition, and my averages for five five-shot groups at 100 yards were always well inside half an inch. A big difference between the two rifles is you can handload ammo for the AR15 but you can't for the 10/22, which brings me around to what this report is all about: handloading the. Shoot match-grade ammunition rather than the mart special stuff and group size will likely shrink even more. Switch out their triggers and you should be able to shoot them more accurately.īullet for the intended purpose is critical in building good. Hang a match-grade barrel on either rifle and you will likely be rewarded with a noticeable improvement in accuracy. ![]() Both can be transformed into precision shooting machines by simply upgrading various parts. The AR15 and the Ruger 10/22 have something in common other than the fact that both are semiautomatics.
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