Shoot it with some full power jacketed loads, clean, more shooting, clean again. Run a couple hundred rounds through it and see if it breaks in any before you shoot cast lead bullets. Barrels will surprise you, sometimes a rough looking one will shoot just fine. Don't make any judgements until you shoot it. Those rough spots can smooth out with break-in, and if you lap it could come out OK. Give it a chance, if it doesn't work out, the warranty is 5 years. Send it back if it won't perform.