I'm not a big fan of the 'limp wrist' concept. I think you can hold a pistol with just a couple of fingers and it will still work. In fact, the gun MUST work when shot weak hand unsupported while hanging upside down from a tree limb. Seriously, these guns are supposed to SHOOT! The other day, my grandson got into this topic so I had him shoot a Sig 1911 holding it lightly with only a couple of fingers. Just tight enough to keep from dropping the gun. It cycled perfectly. I have tried it with my G21SF and had the same results. It cycles perfectly. But that's not your gun... As to Lee dies, the Lee sizing die has a smaller radius at the opening than most other dies. As a result, it sizes just a little farther down the case. That's a good thing! If you start reading on page 59 of Speer Rloading Manual #14, you will see where they talk about 'reading' primers. In fact, there is no discernable difference in the appearance at up to 20% overpressure. In other words, reading primers is hogwash! By the time there are signs indicating something is wrong, you are at least 20% over. That mark could be from the ejection port. Look for some copper coloring on the edge of the port. Consider this: The round just fired and was pushed against the chamber with about 30,000 psi. If there was a dimple in the case before it fired, it sure won't be there afterwards. So, the dimple is created during extraction. My guess: The case hits the lower edge of ejection port. Edit: If the mark is more of a scrape, it could be dragging against the top round in the magazine. Clearly, the extracting case does touch the top round but it shouldn't get more than a slight scrape. Richard Wanna kill these ads? We can help!