One of the standards for the 6mmBR and heavier bullets is the 8 twist barrel. I know my 6mmBR with a 8 twist barrel shoots the Sierra 107MK bullets quite well at distance, but that is a 26" barrel. My 6ARC is a Howa with a 20 inch, 7.5 twist, and shoots those same 107MK bullets, and some older 105AMAX bullets (which are even longer) without issue. The 7 and the 7.5 twist lets you shoot heavier bullets at a little lower velocity, which often happens in shorter barrels like yours, but that doesn't mean they won't work in an 8 twist. Most .243 Win factory chambered rifles have barrels that are 10 twist, and they'll shoot hunting bullets up to 100 grains just fine.
Most of the long range target bullets are the long heavy ones, and most of the better proven hunting bullets are in the 80 too 100 grain range. With that in mind, I don't think you will have any problem hunting with your rifle. There are some other variables at play, but in general, you'll have to try it yourself and see, and that's half the fun.
Most of the long range target bullets are the long heavy ones, and most of the better proven hunting bullets are in the 80 too 100 grain range. With that in mind, I don't think you will have any problem hunting with your rifle. There are some other variables at play, but in general, you'll have to try it yourself and see, and that's half the fun.