LAST EDITED ON Sep-12-16 AT 01:32PM (MST)[p]The one I'm planning on purchasing is a 7x57. I would turn it into a 257 Roberts. Will that conversion work RELH? I know what you mean Homer, the only reason I plan on using an old action is to try to build my own rifle, which I've never done before. I have been reading a lot lately about Mauser builds, and want to try it out. I figure I may have some trial and error in the beginning and don't want to waste a $500 action. That and I think it would be cool to cut, grind, weld, machine and polish an old action and turn it into something nice. There is a Tech Shop that has the equipment I would need and membership is only $150 a month. I will need to gather some of the components and come up with a plan before I really start spending, because there will be a lot of expense from what I've been learning, also because I'm not one that asks to borrow someone's reamer or gauges, I will buy those myself.