Thanks gentlemen. The shotgun is a Parker Bros 16 gauge manufactured in 1921. It has 2 1/2 inch chambers. Barrel measurements indicate it has not been honed out to remove any pits. I presently reload two and three-quarter inch Cheddite recipe that is 6000 psi for my other Parker of two and three-quarter inch chambers. The wood is solid and not oil soaked. In order to accommodate the new shotgun, I need to order a shorter SG 16 wad. I was just wondering because I have thousands and thousands of components of the prior recipe, and I thought I read here or on the 16 ga Society that it didn’t make much pressure difference to fire a two and three-quarter inch hull in a 2 1/2 inch chamber if the pressures were low. As of now, I cut down the hull and roll crimped the recipe, it just takes more time.
Last edited by randy; 08/23/25 05:39 PM.