Had a new extractor installed on Kimber Pro Carry II. Original was loose. Went to range; still had 4 casings to the head out of 50 rounds. 230 grain, FMJ, Blazer, Aguila and Federal. Chip McCormick mags. Not fun. Then tried out new Sig 226 in 9mm. Ran 50 rounds of PMC 115 grain FMJ. 3 different mags and the slide never locked back after last round. Range gave me a couple of reloads to try. Only once did the slide lock back.