I have a couple 7 Dakota
's. The runout on the brass from the factory is bad. Usually measures 5 to 8 before initial resizing. I sent some back to Dakota Arms and their response was that they were able to load and shoot 1/3 inch groups or something like that with the batch that I sent back.
I shoot well with Hornady's 162 grain A-max but I am looking for a high bc bullet with jacket thickness more like the Sierra MK. The A-max killed 4 deer for me last year at ranges from 525 to 690 yards. All one shot kills but one was not recovered until later and I think I hit it off by a couple inches. Clipped the rear shoulder bone, probably.
Yes, I would go in on a group purchase of a 900 bc LRB hunting bullet.