Alliant's load data only goes to 52gr HP at 20.5 gr. max
im talking .223/ 5.56 cal. by the way.
Posted: 5/3/2016 6:35:31 PM EDT
[#1]
21.5 gr is a Sierra accuracy load with 55 gr bullets, works great 52gr SMKs as well, Max load for Sierra. Best all around load for accuracy I have found with 55 gr bullets.