easy enough for a chamber ream but expensive to open bore from .270 to .350 and re-rifle, if your planning on abandoning the .270 look for a good trade, cheaper in the long run, better yet keep it and become a collector. I have to force myself to go out regularly just to try them out. One year in two weeks and with several different groups I managed a deer each with a .257 Roberts, .308, .243, a 12 bore and two coyotes with a .222 Rem