Briman,

Military Match cases is very good brass. Match brass also doesn' t have crimp primers and doesn' t require special effort or tools. The non-match military cases have the crimp primers. The difference between match and non-match brass, if I recall correctly, is the location and uniformity of the flash holes and thickness of the brass. As already stated, GI cases are heavier than civilian brass. This results in a reduction of case capacity. What this boils down to is that the same pressures and velocities are usually reached with less powder. A max powder charge in a civilian case may well be an unsafe load in a military case. I hope that this is of some help. Good luck.[&:]