Hello everyone. I'm new to the site but not to guns. My winter project this year is a Mauser converted to .45 acp. I'm going to try and shorten the action an inch or so and use 1911 magazines. I shortened one a few years ago for 7.62x39 and that worked out great. My biggest worry about this job is not having enough power on the firing pin since the bolt will be much shorter. Any thoughts are welcome. Please don't bash me for butchering a Mauser it's already been " worked on" by someone with a drill press and a big hammer!!