Take the good advice that's been given, and get a stuck case remover. We ALL have had it happen to us....and let me give you a little personal advice from "been there, done that"....The drill that you use with the remover kit...mine got dull from being used in a pinch for other things around the house. Next time I stuck a case, it was too dull to drill with, so I used the next larger drill size from my shop sets... It was slightly too big for the tap to cit a good thread in, and the puller wouldn't work. Had to attack from above..