Well, I have seen slower twist barrels shoot better. The faster you spin it the more chance there is of flight path departures due to the longitudinal axis of the bullet not being colocated with the rotational axis. Again, that is why BR shooters use the slowest twist they can. They need every accuracy advantage they can find.

Hunting is different, because the bullet has work to do after it hits the target. A hunting bullet needs to remain stable when it hits the animal so it will properly penetrate, though on deer it probably doesn't matter. Hogs and Elk are a different story.

And I don't mean to sound harsh, but it is extremely rare for even a highly accurate hunting rifle to consistently shoot 1/3 to 1/2 moa at 1000 yds. We used to have guys bring their long range hunting rifles out the the 1000 yd line to see how they'd shoot. Many of these guys were competitive shooters who knew how to shoot 1k BR. Typically, a highly accurate, 10-12 lb+ hunting rifle--one that would shoot 1/3 to 1/2 MOA groups at 200 yds, would shoot 10-12" 5-shot groups at 1000 yds. The typcial BR rifles would shoot 5-7" groups at 1000 yds shooting side-by-side with the hunting rifles. I saw one exception, where a extremely good competitor got his very heavy hunting rifle to shoot a sub 5"group--once.

This is not a slam on such hunting rifles. Far from it, as a rifle that will hold three shots around 1 MOA out to 1000 yds will have no issue taking game cleanly. Besides, it would be a pain to haul a 15-17 lb BR rifle--with sand bags and bench--into the woods.

I'll shut up now. As is happening here, I usually find long range hunters don't really like to hear what a 1000 yd competition shooter has to say about making a rifle accurate at long range. However, you can't say no one ever tried to tell you.....................