Bagged charges used. After projectile and bag are in chamber, drop breechblock in place thru top of gun and rotate breech locking handle about 1/2 turn to force breechblock against chamber. Vent is in top rear of breechblock, bored diagonally downward to the front. Ignite at vent however you prefer. Vent exit can be seen as bright spot in left center of this photo of breech block.
Last edited by cannonmn; 09-24-2018 at 09:40 AM.