I recently got a .30-30Win cases stuck in my RCBS die. I just removed the decapper rod, inserted a steel rod that fit in the case mouth, and a couple moderate whacks with a small hammer popped it right out. No sweat.
Thanks Hailstone, you are correct, quarter by 28 is the fine pitch and quarter by 20 is the coarse. I got a bit mixed up.....Most of MikeG's instructions are right on but the thread size given is a course thread bolt. 1/4-28 is the fine thread bolt. You could use either should you have the drill and tap but the course would work better as more material is used (deeper threads). Drill bit size is a #7 (.201) for course and #3 (.213) for fine threads. RCBS's kit used a course bolt setup.