This may sound strange but I want to fire RST 2 1/2
shells in a 2 3/4 chambered gun. The gun is a H&H 12b built in 1892 and rebarreled in 1965 by H&H.I believe the gun was originally chambered for 2 1/2 because it weighs 6 1/2 lbs
Would the long chamber have an adverse effect on the pattern?
danc