Copper fouling after Losso use

[spladi]

The barrel is done, I wouldnt waste anymore time or money on it.
The same thing that happens in a new barrel when you have to " fire lap" the throat for a few rounds to get it to stop is happening know after your throat is so fire cracked its depositing misty copper down the barrel.

Yeh, had a 22 WSSM that shot a great group once with a clean bore, and that was all it could do. Talk about a bore burner, now that was one.