So after doing some research, I have made the decision to go with the 7mm caliber. Of course through my research the rabbit hole I have gone down gets deeper and deeper.
I would like to shoot a 170-180 grain bullet and see most factory rifles are a 1:9 to 1:9.5 twist barrels. I spoke to a gunsmith at Begara as I am considering one of their rifles and he assures me that a 1:9.5 on their factory rifle will stabilize this bullet no problem, but most of the articles I have read suggest to go with a 1:8.5 or 1:8 twist to stabilize these heavier bullets. Does anyone have some real word experience shooing a 170+ grain bullet out of a 7mm and what their twist rate and results are? Would the 1:9.5 twist be sufficient or will I need to get something like 1:8.5?
IIRC you're not loading your own. That being the case, 160 Nosler Partition Federal Premium is a very sweet spot for the 7Rem mag. It's an excellent compromise of good bullet performance on game, a high enough BC to work well at extended ranges, 0 issue with any factory rifle twist, good availability, very good sectional density providing deep penetration, and IME, a very consistent and accurate offering from Federal.
If I was going to load my own I'd probably start w/150gn TTSX. Might be worth giving Barnes ammo a try with that projectile. Watched a buddy kill 2 elk and a bunch of deer with the 150TTSX in his 280AI and it's quite deadly.