Selway has had quite a bit of 6.5 in stock lately. Need to snatch some up here soon before its all gone again.
I've got plenty, but that is a good price, under a Buck Per Shot for a premium round, only $18.50 per box of 20 for SST loaded Hornady. Compared to some of the other oddball (yes, the Grendel is an oddball) AR15 calibers, the Grendel is both higher performance and cheaper to shoot. Certainly there are more rifles chambered for 6.8 SPC and 300 AAC Blackout, but premium ammo for both of those rounds tends to run $1.50 on up per shot.