6.5 Grendel is more expensive to shoot but opens up a whole new world in range and capabilityies for AR hunting with .264 bullets.
^^^^^^^
This!
I had almost forgot about all my AR's...even though one is 7.62x39...IMO the 5.56 is worthless in the hunting woods.
But the 6.5 Grendel has now put my AR's back in the woods and not in the safe!
I still own one 5.56, but it is in CQC mode...incase we get over run by zombies or Democrats!