Bullets just aren't moving fast enough to reliably expand. They drill small holes in and out. Too much game wounded and lost when the shots get much past 200.
This is what I thought when my friend/neighbor put together an AR in 6.5 Grendel. We patrol our properties at least 5 days a week for hogs. We've killed several hogs some of them ^200 lbs. with it. None got away and 2 large ones were killed at over 300 yards. I shot one at just under 350 and he went down for the count. I know this is a limited sample but so far I'm impressed. I mostly use a .30-06 bolt rifle in the daytime and a .223 AR at night. The night shooting is generally under 200 yards. In any case I wouldn't hesitate to take a shot with the Grendel 129 grain Nosler LRAB if it was a shot I would take with a .308 w/150 grain bullet
Patriotism (and religion) is the last refuge of a scoundrel.
