Anyone have a Mesa or offer comments?
I wouldn't recommend one. I've had two, 6.5 CM and 6.5 PRC, and both were intermittently incompatible with the Hornady 147 grain factory ammo blowing primers on a fairly regular basis. I had the same issue with a 6.5 PRC in the Ridgeline Ti. I also had a regular Ridgeline in both cartridges. Neither blew primers with the same boxes of factory ammo but neither was reliably better than about a 1.75 MOA rifle either.
I think some of that is ammo .. bullets specifically. I did some seating depth testing and came out with different lengths .. considerably different .. among different boxes of the 147 grain ELD match bullets, and all different than the factory ammo. The factory ammo seemed to have a more "bulging ogive" if that makes sense, and that made contact with the rifling prematurely. If it had only been factory vs component bullets needing different lengths, I'd have just shot component bullets and not worried about it but with different boxes of nominally identical component bullets requiring different seating depth, it just didn't float my boat.
So .. I wouldn't recommend either Christensen rifles or 6.5 CM or 6.5 PRC to anyone right now. Too much seems wrong in unpredictable combinations. That said, I do have a brand new Ridgeline in .300 Win Mag. New Lapua cases don't really want to chamber, takes a good bit of force to close the bolt. It may be the extractor, not the chamber. We'll see. If this does not work it will be my final try with Christensen. I'm about $12000 into them and the only Christensen shooter I have is a .22 LR Ranger.