Aa2230 / Aa2460 / Aa2520 ???ar15 1:7

[Twinson]

What is the difference between these powders? I tried looking on their web sight, but that information was pretty limited. I currently use AA2230 with 68/69 grain HPBT. I have seen some published loads for AA2460 with the 68/69 grain HPBT also. Does one powder do better with lighter bullets and one does better with heavier bullets? Thank you

Information

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[hagar in SC]

2230 is the fastest, and works better with light bullets, 2460 is a little slower, and 2520 the slowest. I use 2520 with my 68/69 grainers as well.

[Bayou]

I use 2520 with 77 gr in a 1:7 twist barrel and 2230 with 55 gr in a 1:9 twist barrel.