07-27-2021, 11:17 PM
6.8SPC and 6ARC won't give much different performance from your Grendel. I'd want a short .300 BLK or 7.62x39 for some variety.
If you just want another caliber for the heck of it, then just pick the caliber that's most readily available to you locally.
If you just want another caliber for the heck of it, then just pick the caliber that's most readily available to you locally.