OP, the differences in quality between the assortment of 68 manufacturers isn't what's being compared here. I've owned 6.8's from several companies; first from RRA, Spikes, Stag, DD, Noveske, Bison and ARP. Quality was great on all of them, however there were a few specific individuals who put in the time to figure out exacting specs to suck out the round's full potential, providing lower chamber pressures allowing for hot loads, tighter accuracy, improved rifling for better stability of the lighter 85-95 gr solids that ultimately give you more speed, distance and better killing capability. The differences aren't enormously great, but they're there, and don't cost more to obtain considering the price of their barrels.