The 6.5 Grendel is the winner. I'm building 2 rifles, one for me and a combo B-day/father's Day present for my Dad. The pigs are taking over his hobby farm.
All the shots will be 100 meters average. And I just like the availablity of the Grendel ammo over the 6.8. My gunshop carries 123gr.
I'll let you know when I get them put together and how they do. Just checking trail cams and putting out a little bait, I've killed 6 pigs and 2 piglets, with one sow heavy with young. I'm bowling them over with a 223, a 6.5 maybe overkill.