Re-running in a barrel

[Gaz]

My No.4 has a secondhand barrel fitted. The barrel coppers up really quickly - after a quiet afternoon's shooting the rifle looks like it has a copper sleeve in the bore.

I suspect this is because the barrel was never properly run in when it was new, being a service-issue barrel. If I was to thoroughly clean the barrel of all the accumulated gunk (with C2R, of course!) and then go through the run-in procedure, is this likely to help stop it coppering up so much?

(I know excessive coppering is one of the main signs of a dead barrel, but I'm not hugely worried about pinpoint accuracy from this rifle)

[dromia]

I would take it back to bare metal with C2R and see what it does with a clean barrel.

Copper begets copper!