I’ve had 6.5 CMs in one form or another since about 2011 or so. I’ve shot lots of southern deer and most dropped where they were shot. There is an abundance of very good factory ammo and even though I reload, I’ll still buy some factory loads. I’ve taken deer out to about 200 yards and will stretch it to 300-400 yards if given the opportunity.
I was actually looking at a 308 Approach when I ran across a great deal on the 6 CM. I figured if I didn’t like it, I could always rebarrel. I’ve probably put 130 rounds down the barrel and I know it’s accurate. They say recoil is even milder than the 6.5, but I’ve got brakes on both and I’m not sure I can tell the difference. I’ll hunt with it this fall and that will be the big test. The downside is barrel life, which I’ve been told is about half of the 6.5. I am happy with the rifle, and am glad I got it.
Both will do what you want, and both will do it well. Ballistically they shoot just about the same, but the 6.5 packs a little more punch. The biggest advantage of the 6.5 is ammo is availability. If you don’t reload, that is a huge benefit. You’ll also find many, many more choices in 6.5 rifles. If I could only have one, it would be the 6.5.
Does this help?