You will hit a home run somewhere in these loads listed above. The Speer 52 needs to be seated at their recommended overall length or it will jam in your AR-15. Details on loads I used. This Extreme series powder has likely won more benchrest matches than all other propellants combined. and 8 lb. Mags are 20 round P-Mags, with false bottom to limit to 10 (I am in CA). However I fault Hornady for not testing the most popular AR 15 bullet in the most popular .223 rifle, the AR 15, and using this SAME data in their newest manual as this data for H335 has just been copied for years in manuals 10,9,8,7, and maybe older manuals? IMR 8208 XBR Powder $ 29.99 (0) IMR 4350 Powder 1lb. I had load info for 62 grain bullets but can't seem to find it this morning. I'm using H322 right now with 55gr bullets (22.6 gr for about 2840 f/s in a 20" AR) and it burns real clean. IMR 4350 Powder 1lb … Thanks. We think this powder is the best choice for reloading 5.56 Ammo. The powder I have on hand now is H322, Reloader 7 and reloader 10x I would be greatful for any help this morning. If you're unsure, or just want options, check as many boxes as you'd like. Select your cartridge type from the drop-down list. My rifle loves 23.5g of H322 with a 55g Bullet, shooting very tiny groups. 22.0 to 22.5 grains of LT-32 works great too. Hodgdon H4895 Powder $ 29.99 (1) IMR 8208 XBR Powder. Available in 1 lb. ALL Accurate 2015 Accurate 2200 Accurate 2230 Accurate 2460 Accurate 2495 Accurate 2520 Accurate 5744 Accurate LT-30 Accurate LT-32 Alliant Powder 1200-R Alliant Powder 2000-MR Alliant Powder AR-Comp Alliant Powder Reloder 10x Alliant Powder Reloder 15 Alliant Powder Reloder 7 Alliant Powder Varmint Hodgdon Benchmark Hodgdon BL-C(2) Hodgdon CFE 223 Hodgdon Clays Hodgdon H322 … I am finding load info for 60 or 63 grain bullets. Hodgdon H322: 23.0, 23.2 grains. Alliant Reloder 15 Smokeless Magnum Rifle Reloading Powder $ 27.99 (1) Hodgdon H4895 Powder. As a fine extruded powder, it flows through powder measures with superb accuracy. Find what you need in four easy steps. H322 provides match-grade accuracy in small- and medium-capacity cartridges like the 223 Remington, 6mm PPC and the 7mm TCU. I suggest 23.5 grains of H322 with either bullet. ... A precision rifle enthusiast and owner of GA Precision, George likely needs little introduction. Then select your bullet weight, powder manufacturer and powder type. In your shoes, I would start off at loading 3 shots at 22.5, 23.0, 23.5, and 24g and stop when ever you see extreme pressure signs. containers. The first barrels produced by Colt for the AR-15 had a slow 1:14 twist rate, which was adequate for 55 grain bullets under normal circumstances. The barrel is a Krieger, 22" long. Alliant Reloder 15 Smokeless Magnum Rifle Reloading Powder. The loads I am using are from the Sierra manual for the AR-15. Good luck! Plus that load maximum seems to be anemic even in a bolt action rifle. Gas system appears tight with no leaks. Click "Get Data" to view results. If there is a specific load you just have to run, consider rebarreling your rifle with a barrel with a more appropriate twist rate. Powder average MOA, Std Deviations, Velocity for load area, different bullets, huge database AR15 Small Rifle Primer Tests #2 Take Aim at Rifle Reloading Data. When loading for a 5.56 NATO-chambered AR, the COL is restricted to 2.260 inches. Max according to Sierra is 24.1. ... Zach has several friends that are getting into reloading shotshells because of Zach’s reloads. It has a large hollow- point and needs be seated somewhere close to 2.200" to work. It's a much faster powder than Varget. When shooting his handloads, he single loads each round in a rifle, so COL isn’t limited by the rifle’s magazine length. H322 provides match-grade accuracy in small- and medium-capacity cartridges like the 223 Remington, 6mm PPC and the 7mm TCU. Start a little lower and work up to it using the normal safety protocol. Vhitavouri N133: 22.4, 22.6, 22.8 grains. I am loading for a 16 inch 1 in 9 twist AR. Some of his best results were with handloads measuring up to 2.320 inches. Seems like Varget is pretty darn slow for 55gr bullets.