6 months ago the extractor on my S&W 4013 snapped off. It took me a while to replace it(tools, time and experimentation), but I put a new one on and was good to go. Ran maybe 200 rounds through it and yesterday the new one snapped as well. Same ammo, same break style. I can understand the 15 year old one breaking off, but why the second? Ammo used is Speer 180gr FMJ and not any cheap crap. The weapon is cleaned regularly and inspected before firing. The main springs were different in the two cases as I did replace it with a factory part, but 100% new. So is this 'one of those things', or is there something I need to look into.