Originally Posted by
shooting on a shoestring
The way I skin that cat is with 2 pieces of 5/16” aluminum rod cut to a little less length than the cylinder window. I drive a 36 cal ball down the barrel from the muzzle and stop about mid-barrel. Insert 1 rod in the barrel from the forcing cone. With muzzle up, I put the second rod between the recoil shield (over the firing pin hole) and the 1st rod. Then I drive the ball down until it contacts the first rod and proceed to expand the ball by peening it. Remove the 5/16” rods and drive the expanded ball out through the forcing cone.
Crude but effective.