I have the opportunity to buy a used Rem 700 300 RUM. The guy is deperate to sell. No optics, he said the barrel was sent away for cryo treatment and a local smith has put a break on it. I am loaded with 30 cals, 308 30-06 and 300 win mag. My idea if I buy was to use action maybe for a 338 edge. What do you guys think of the caliber? Any other thoughts? Thanks guys