My 6.5x47 pac-nor super match barrel has done 2000 shots and it's begining to copper foul quite badly now.. Its had a hard life shooting 200 and 300yds McQueens . Also 600 and occasional 1000yds snaps comps.
At the moment is still shooting great.
I recently bought a teslong borescope and it looks pretty firecracked.
Photo is the patches used to clean the bore soaking in the dolphin muzzle brake.
Approx 90 shots through the barrel before this clean..
There's probaly 12 patches in the brake ports
No copper in the bore on inspection.