I put a Clark .460 Rowland kit in a Springfield several years ago, and liked it - but got talked out of it on a trade. Have a HK USP .45 now, and have read it is OK for. both 45 ACP +P & .45 Super? Have a box of each by Underwood, both with 255 gr Hard Cast Flat Nose, with Underwood rating them at 925 fps for the +P and 1075 fps for the Super. Haven't tried these in the USP - yet, but want to use them as potential "pig medicine".
Anyone see any problems with these loads in this pistol?
Mike Holmes
