I am loading for AR-15, 16" length 1:7 twist barrel, 5.56 chamber. The load is Hornady 75gr BTHP (#2279), Varget, CCI#41 primer, LC08 cases.
Charges were picked based on the .223 Service Rifle data in the Hornady load book. In the following photos, the charges run from left to right, low to...