I reloaded some 40 S&W 180gr LFP bullets and shortened the OAL 1.100. 15 with 4.1 gr HP38 (950fps) and 15 with 3.7gr HP38 (850 fpd). No hangups with the lighter load and 2 with the heavier load. Does this indicate week springs either the recoil spring or magazine spring? Using 4.1gr of HP38 with OAL of 1.125 hangs up about every other round. Factory Blazer 115 frangible fed great.