I've just started reloading .308s for my Socom 16, however all of my reloading has been semi auto and magnum pistol. That has left me with an abundance of powders not really suited for rifle reloads, that being said, with a plethora loading data and information such as Steves page 8 and Quick Loads which match multiple powders for or all calibers is there any problem using powders such as IMR 4227. One of the things, without something like Quick Loads, the rifle data usually for a 20 to 24" barrel and the shorter 16" barrel could lend itself faster burning powders. Just curious, Bill