I can't begin to imagine how many early American doubles with original short chambers have been reamed to 2 3/4". I don't think removing 3/16" of metal at a very, very shallow angle or degree at the front of the chamber is going to hurt anything on a set L C Smith fluid steel barrels. It will slightly reduce recoil and maybe improve patterns a wee bit. Just shoot reasonable loads and you will be fine. No regrets.
JR

Last edited by John Roberts; 09/28/17 10:58 PM.

Be strong, be of good courage.
God bless America, long live the Republic.