1600- 1700 rounds through this barrel. All but 100 or so my loads, 6.5 CM, 142 SMK, 40.4 Gr H4350, Lapua brass, Fed 205M. Run about 2625 to 2640 over a Labradar. I looked at it 150 rounds back and saw a little bit of chipping, but nothing like this.
I'd stop cleaning copper out unless you have serious accuracy or pressure problems.
Proof is in the pudding, though. If it starts throwing nasty fliers (over 1 MOA) I'd ditch it.