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I've had several rifles other than handi's that came to me with cases stuck that seemed to be brazed in, and drilling/threading/extracting the case where the breach is readily accessible was not possible. I went to the industrial supply store and got drill rod stock that would fit the bore and still slide easily, AND fit into the neck of the case. Smaller rods don't work, as they flex when hit, and take up much of the energy applied, and the case, "she no move'. I cut it so that only about a half inch extended out the muzzle, chambered the corners of the rod, and slid the rod into the bore, put the rod on a piece of hard wood on the floor, and slid the barrel/action down onto it much like you'd set a steel fence post. The muzzle doesn't get damaged, the case pops out, and there's no damage to the barrel. No vise marks, a hammer doesn't get close to the crown, and there's usually enough mass in the barrel/action to get the job done with a couple of blows.