Though it's been scarce of late, I think we'll be seeing more Wolf 6.5 Grendel fmj for 25 cents a round or less, which is a good reason to shoot that caliber, which, all things considered, outshines 5.56 and 7.62x39. It's a good, flat shooting, medium power "assault rifle" round that can reach out and put the hurt on something at distance.
Privi Partisan really should start exporting 6.5 Grendel to the US again, especially since the Serbian military is chambering their AKs in that caliber.