I've build a 6.5 PRC on a Defiance XM. It is un believably accurate and the nicest rifle I have ever owned. However, I find that I'm hunting with my 280AI and not the 6.5prc. So, I can either sell the 6.5prc, or chamber. I'd like to chamber it in a 338 caliber so when I'm in Alaska I have something a little more stout than the 7mm. Suggestions? I reload.