I am more for a bit different cartridges.
So I vote for a 6 5SLR for a rifle that will see a lot of rounds. Think .260Rem w. 6.5x47L neck & shoulders. Uses .243 Win or .260 Rem brass. One pass through the FL die gets you a 95% case. I use Rem .243 brass for a no neck turn solution. If you are thinking 26" barrel, expect 2900+fps from a 140 gr bullet. I ran a 28" and got 2950fps before, and my new one with 22" is getting 2840 with a 140gr. Not broken in yet.
My daughter has been shooting it since she was 11. Killed a big mule deer buck at 637 with it and dumped him on the spot.
6CM vs 6.5SLR
If you are going to hunt more than shoot steel, I vote 6.5SS. Wicked hunting round. I have one now, and am building a second one. I can get 3160fps from a 150 SMK, and 3200 from a 140 HVLD.
6.5SAUM w. 140 vs 6.5SS w. 150