03-31-2012, 09:47 AM
Just based upon ammo availability in my area, it isn't as popular as 6.8 or 300 BLK. Not as common for uppers, either. Most I talk to ask me if I meant 6.5 Creedmoor and not 6.5 Grendel. No idea on how many rifles/uppers are out there, and I doubt anyone could give more than a WAG.
