Yes, There are skirts on percussion hammers that grab onto exploded caps in the skirt, even when there is a hair lip cut in the front of the skirt.
I use a grinding bit on a dremel tool to both polish the skirt, and to angle, or cone the skirt so that it is wider at the mouth than back where the hammer face is located. That seems to stop the caps from sticking in the skirt, and they drop off the hammer and the nipple when the hammer is lifted.
Since I am doing both polishing of the skirt and hammer face with my grinding bit, removing casting burrs, and coning the skirt at the same time, I can't say which action is responsible for the "fix". I just know it works. :shocked2: :haha: :hatsoff: