David D
I took a Rem 722 and had it re barreled to 6mm br, with a 1-12 twist, no turn neck, at 22 inch long. The worst 5 shot group that it ever shot was .9 inch. Most groups are one hole. It doesn't seam to care what you feed it as long as you keep the bullet weight between 60-80 gr. It's the most expensive fox coyote rifle I own. I think you have made some good choices.
Curt