What is your intended use for the round? Shooting steel at distance, large game hunting, varminting, benchrest, shooting bug-hole groups…?
I used to own a 6.5CM and might get back into it again some day. For me, I was mainly loading it for PRS competition, shot it for a few years before I moved onto a lighter caliber for positional shooting. I like the 6.5CM, it’s pretty versatile, bucks the wind decently, not hard to load for, has a manageable recoil, and someday I’ll probably build another rifle in 6.5CM for NRL Hunter type competition. I still have all my dies and a modest supply of components.
I have noticed that there are some trends that go back and forth within the rifle reloading crowd, a lot of it depends on your application (i.e. benchrest vs hunting vs PRS-type competition). For example, when I first got into 6.5CM, the trend was to only neck-size or use a shoulder bump die to avoid overworking the brass, but fast forward a few years it seems like a lot of people have trended back to full-length sizing dies. Also, back then a lot of people were using dies with neck bushings to set the neck tension, but now folks are using a mandrel die.
Good luck!