[aa1911]

My new one did the same thing, especially with higher power reloads. Methinks the chamber needs a 'seasoning' on it much like an iron skillet.

Rounds that stick every few shots in my newer one would not stick at all in my very old wingmaster which even has rust in the chamber half the time.

The old paper shotshells have a wax coating which I think also helps to ensure shells do not stick, both the one being shot and subsequent rounds from the deposit of a slight amount of the wax.

I keep oiling the crap out of my chamber (making sure I clean it out before firing) and it has greatly improved.