CWK,
We have been so busy trying to identify the manufacturing source for your gun we failed to give you acomplete answer to your basic question re,"Not For Ball" The 11B means that the barrel was bored as an 11 gauge .751 nominal diameter and the 12M means that the barrel is choked to 12 gauge .731 nominal Diameter. This results in .020 choke constriction.Your gun should of course under the British rules for proof be chambered to accept as a 10 gauge shells!
Last edited by Roy Hebbes; 01/08/12 09:51 AM.
