Jamming? I have 1 that belonged to my father-in-law (never jammed, very accurate - he wouldn't keep a rifle that wasn't - but it did break the firing pin return spring once and that stopped it from firing). I have one that belonged to my dad (never jammed, never broke but dad didn't shoot his rifle except to kill deer with it - like my FIL, one shot, one deer). I bought one for my oldest son. No issues with it either.
Ours have never used anything but 180 grain bullets, Remington or reloads.
Had a buddy with one. Same thing. One shot, one deer. No jamming issues with his either.
Jamming?
Rust? No issues with rust either, but then again, we clean/wipe down every time we hunted, whether it was shot or not.