Do NOT pound on the load. If it will not push out, use a puller but they do not work with copper bullets. I just cleared a load from a CVA Hawken where the load did not fire. The guy broke the nipple and it looks like a pipe wrench was put on the breech plug. No way on earth to remove the drum or plug, rusted in. I dropped a puller in to find a copper bullet in a sabot. It is a round ball gun. The nipple was harder then a drill bit so I used a carbide burr to open the hole, I put 4F in and a cannon fuse, laid it in the grass and lit it off. I got the threads cleaned up and installed a new nipple.
Try putting penetrating oil in both sides and let it soak. Only use a strong, steady push with a good rod. NO HAMMERS.
