Randy - you should be able to easily push it out of the chamber using a cleaning rod from the muzzle end. If it went past the extractor one way, it should be able to the other. If you can't work it past the extractor, you should be able to easily remove the extractor retaining screw in the bottom of the lumps and remove the extractor to allow the snap-cap to exit.

Post back if that doesn't clear up the problem.