If you are using the 1/8" paper punch you will have to hold them in the cup somehow. I use the 1/8" for the bottom of the cup but a larger dot to go on top. Even then sometimes all will fall out unless I spray it all with hairspray. If you have a cap go off in the punch out,You will need to clean the punch. I use soap and water and toothbrush(I knew I would find a use for that someday). The caps are very corrosive. You must be on your game in cleaning your guns.The rusting can be hard to deal with if your methods are not up to it.
n.h.schmidt