Posted by Dick Miller on January 3, 2018, 8:08 pm, in reply to "20 gauge question"
Bobby, If your gun is 20's vintage and it has not been altered it has 2-1/2" chambers. Modern loads are 2-3/4" with the exception of RST, Polywads, and others. Use these for safety's sake and to avoid damage to the gun-- particularly the head of the stock.