Wondering if you guys could help me out? I've been shooting 150gr bullets and getting decent accuracy. I noticed in you test you used 168gr, and it seemed to like it. With a 1/10 twist it should stabilize 180gr. shouldn't it? My question is: Can we use a 180gr bullet in the XCR-M? I have had a M-14 for a few years now, and the word has always been that you shouldn't shoot anything heavier than 168gr in them, as heavier bullets can cause damage. Is this the same with the XCR or is it okay to use heavier bullets because of the different gas/recoil system?