Thanks Daryl S, makes a lot of sense. Monday I might mail the .577 double rifle to a top name double rifle gunsmith for his opinion. For him to sleeve and rechamber both barrels would be $780.00. My question is: Would this raise the value of the rifle equal or more than the repair cost, or would it actually lower the value of the rifle. No extraction problems now, bores are good, chambers have a lot of small pits 3/4 of the way up the chambers. Should I just leave it alone? The rifle is a heavy .577 3" BPE by a top name London maker.