On AmmoSeek the least expensive brass-case 6.5 Grendel from a reputable seller is $1.93 per cartridge, Hornady Black. Compare 6.8 SPC with Prvi Partizan at $0.824 per, or Hornady Black at $1.20. 6mm ARC is $1.45, .224 Valk is $0.80, .300 HAM'R is $1.24, 6.5 Creedmoor is $1.28. Why does Grendel cost the most? I haven't shot mine in a long time. Is it time to re-barrel in something else?