Since you've got the base of the casing all buggered up, I'm not sure if the standard case remover tool will work. I just looked at mine, and as described before, you need to drill a hole in the base of the casing at the primer pocket and tap it, then use the extractor tool. You may have to take it to a 'smith. The onlt other alternative I can think of is to turn a tap or easy-out CAREFULLY into the brass, making sure you don't cut through it, and use it with vise grips on the end and gently tap with a hammer with die snugged lightly in a vise. Be careful not to mar anything. Also, be sure to lube properly from now on.