I just got a pound of Accurate 2015 for load development in my .32 Miller Short. This case is made from 357 maximum Starline brass sized in a .223 small base die and trimmed to 1.273 inches. It is used with cast bullets in bench rest CBA matches. So far it looks promising. I have read that it can be used in a variety of cartridges including 40-50 Sharps Straight, 45-70 and PPC rounds.