I learned re-chambering rounds in a semi-auto may create a problem. I carry a round in the chamber, and when I uncarry to store, I remove the round from the chamber. This means every time I go out, I'm re-chambering a round multiple times, and increasing a potential problem.
I learned when a round is chambered, the feedramp pushes the bullet into the case. Each time the round is chambered, the bullet is pushed into the case. Manufacturers recommend not to re-chamber a round more than twice.
I believe the presumption of the cause is from the normal slide release method of chambering a round.
Additionally, there is a design by creating a cannelure to the case helps alleviate the problem. I have some admiration for manufacturers willing to add a small design to help solve a problem, if done correctly. Gives me some confidence in the manufacturer's R&D.
I'm planning to make some changes. I'll still unload/reload when I carry and store, but I'm not going to slam the slide on a round, presumably eliminating the cause of the problem. I intend to slowly release the slide on a round (and I presume I won't cause another unknown problem by doing this). And when looking for ammo, I'll choose the cannelure.