Barrel Counter Bored......
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
https://www.milsurps.com/images/impo...IMG_0024-1.jpg
Had 1/8" eased off the ...
muzzle of my M1, by Bruce of the DCM van back in 95.
No problem with functioning.
Still have the barrel as I swapped it out for a 7.62.
Do it!
This was regularly done on...
M1 Carbines. My CMP Standard Products is counterbored about 3/4". It shoots great. Have fun!
Bruce