New EDIT French Tabatiere 10ga Black Powder Shotgun using an similar Enfield Snider Action. It was originally a French 1824 Flintlock Musketbefore conversion.  It is proofed Black Powder. I believe the chamber is no longer than 2 5/8" and most likely shorter.   Believe it or not the gun functions perfectly. Why would you want to shoot it when it makes an absolutely cool man cave gun. Super cool! It is big heavy and you will be the only one with one. I am just thinning out my collection. I originally thought it was an Enfield Snider converted gun.  the action threw me off.  A kind hearted fellow Bisman devote helped me figure it out and I credit him for the correction.  I try very hard to accurately describe my collection.   When I get something wrong I will correct it.