I have had 2 264's both with pretty beefy barrels, IMO they are the most temperamental round I have loaded for. I always dreamed of launching 140's at 3200 fps, however I can't get that speed out of either gun with any accuracy, ramshot mag is the best all around powder which IMO is still a tad fast to be ideal for it. If I had to do it all again I would do a 6.5-06 or 6.5-284.
