A ding in the side of the case body is not uncommon. Generally minor and does not interfere with the loadability of the case. My HK-91 pounded the cases until I put a port buffer on her. Never caused an issue. Resizing removes most of it and the pressures of firing irons out the rest. Ejection promplty leaves a new dent. I may shorten case life by a loading or so, but not a big deal.