OK. I talked with the guys at Lee. Sez the tech: "Rifle cases take a lot of pressure on the loader.' Sez me: 'Not that much. Methinks something's amiss." So I thanked him for his time and bid him adieu. Then I went into my shop, found myself a 3/16" pin punch, loosened the collet a mite, then proceeded with a controlled wailing on the decapper pin head with a ball peen hammer. That got the shell out. Then I sprayed wd-40 inside the case, relubed the outside, and reinserted it and re-tightened the decapper in the collet. Bingo. Problem solved. I fiddled with the position of the ball and reset the decapper pin. Took four more 270 husks, reapplied lubricant outside and in, and the die resized and decapped all four without further drama. If there's any moral here, it's that I'm starting to feel a little warmer toward RCBS dies and a little frostier toward Lee.