WARNING: This is only for rifles chambered in the higher pressure 60-62.5 kpsi loading of the 5.56 NATO ammunition, this should never be used in rifles chambered for the lower pressure .223 Remington round. Cases: Mixed Lake City brass, once fired, FL Sized Primers: CCI 400 Bullet: Hornady 55gr FMJ-BT w/cannelure Powder: Accurate 2230 26.2gr 1.5 MOA group using iron sights at 100 yards, all 10 rounds. Knowing that rifle and me, if I used my lead sled and my scope that would be under 1 MOA, possibly 0.5 MOA. No signs of over pressure at this loading, also shot 26.3 but the group opened up to 3-4 MOA. I started at 25.0gr and worked up to the maximum published load of 26.3 by Accurate's load manual Edition 5.0. The Rifle Bushmaster XM15-E2S 5.56 NATO chamber 1 in 9" twist 20" barrel A2 front and rear sights (how I was shooting it, for this work up) I have a scope for the rife but use it for hunting and 62 gr Barnes TSX bullets. I will get the chrony out and measure muzzle velocity in the next few days. Thought I would pass on my results.