BTW everyone. Here is a secret for you. One of the best loads you can do in an AR15, period, is going to be 22 grains of Benchmark using a 77 Grain Nosler or Sierra bullet. Berger OTM, slightly less, because its a longer bullet and will yield more pressure. This is a lights out load and you will be hard pressed to find a consistently better load that works in all climates and all temperatures, reliably accurate. That is what we think, and we have tested thousands of loads, using pretty much every powder you can buy.
Basically, if you take any manufacturers brass, and you full length size it properly, its all going to be reliable and good. At least we think so, and all we do is load and test all the time, for years and years on end, through many, many AR15's. People measure the weight "extreme spread" of the group, and claim because its more than brand X, that its simple not as good. Seems valid, and could make sense, or is it that its not enough to matter and its close enough out of an AR15, which is NOT a precision shooting rifle due to all its moving parts and loose tolerances. So we ran a test, and took very very particular attention to consistency. So we did this:
- Did not prep any brass. Straight from the box it came from, no prep, no primer pocket sizing, no primer pocket depth standardizing, no neck turning, no neck trimming, no bevels, no nothing.
- Places in FULL LENGTH sizing die, with expander ball.
- Federal Gold Medal match primers, weighed to .02 grains, only selected ones that weighed exactly the same
- Nosler 77 Grain Custom Competition, sorted through hundreds, and only selected ones that weighed exactly the same to within .02 grains. As in 77.00-77.02 grains.
- Benchmark powder loaded to 22.0 grains, and triple checked on 3 scales for exact, within .02, as in 22.00-22.02 grains, each.
- OAL was 2.255 on all loads
- We weighed all the brass, but did not select brass based on weight range, just pulled a handful out of a pile and used it.