If you do the 6mm Grendel or other variation off that case have a look at Nosers 90 & 95g HBT bullets for medium game.
I run them both in my 6x6.8 and IMO a heavier bullet is not needed on deer & antelope.
Noslers HBT does an excellent job of dropping game.
The 90/95 runs at 3000 fps in my rig 22" bbl, bolt build.
Pass the 105's.
Hint.............