Sounds similar to a problem I was having with an early TC frame in .223. The pre- easy open actions can be stiff to open, no doubt about it. Is it harder to open after firing a round? That was the problem with mine, using UltraMax reloads in military brass. Primers seemed soft, and the firing pin was sticking in the primers, causing a swipe mark on the primers (see photo), and hard opening. Using Federal factory loads, as well as reloads with CCI primers did away with the problem.
Had the same problem using factory Winchester 30-30 ammo. Didn't happen with factory Remington though. Finally fixed the problem by replacing the firing pin spring, which was too weak, allowing the firing pin to stick in primers instead of pulling back below the firing pin opening of the frame.
As far as the empty casings sticking in the chamber, that does sound like high pressure, though it could be a rough chamber causing the brass to stick. I would try another brand of ammo and see how it works.
Larry