The number one difference between the Berry's and the Hornady's is that the Hornady's are jacketed and the Berry's are plated. Different bonding process, Jacketed will hold up to velocity better. The L7A1 Hirtenberger ammo that Mil/LEO were using were running well in excess of 1400 fps, which is past most plated/coated. If you do run a can, Chevro is right, make sure you can either take the can apart or run something without an exposed base.