I had my barrel counter bored to get rid of a belling problem caused by a lot of years of judicious cleaning without regard to muzzle wear. Using machinist's gage pins to check the MW it has "0" MW (a .300 pin fits but a .301 won't). The c-b is 3/16 inch deep. Does any one know FOR SURE if the reliability has been compromised? I am planning on taking it out this weekend to try it but was wondering if I should expect the worst-case scenario. I plan to open up the gas port 1 drill size at a time if necessary to get the reliability back if it doesn't work. Is there an ABSOLUTE maximum size that the gas port shouldn't be drilled larger than? I will be using # and letter drills in sucession if necessary for enlarging.
TIA
Jon
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