1. S

    best powder for 16 " AR,75grain

    I'm trying to decide what powders to use in my 16" AR with 75 grain Hornady HPBT match bullets.Do you guys know what the best powder is for a short barrel and heavy bullets?On hand I have Varget,AA2520,AA2200,Benchmark, and H4895.All the data I've seen are for 24" inch barrels. Thanks, Steve