Newer handloaders beware of the "cheaper" military O/F brass. Just into my 4th year of hand-loading and the learning hasn't backed off a bit. I bought some .308 & 5.56 O/F military brass last year....unbeknownst to me at the time; the brass is bell-shaped at the base from having been fired from a machinegun, and it didn't occur to me that my so-called full length resizing dies aren't designed to push out the bell shape. The bell shaped brass won't fully chamber in my tight little rifle chambers..... Since then, I've gone through all my hand loads , and checked them with a caliper; pulling the bullets, resizing the brass with RCBS Short Base dies, and re-releloading the cartridges.. I'm saving the mixed powder medley (for other uses) and it's almost up to a pound. A pain but I'm glad to have sorted this out.