I searched and didn't really find an answer to my problem. I have a mossberg 935 and it cycles fine when it's inside my house or when it's when it's warm outside, but when it gets cold it cycles really slow and sometimes gets stuck. It usually will eventually close the chamber but it takes it a few second. When I watch the action close, where the action goes slow, there is some lighter color likes it been rubbing. It's almost like once it gets cold the action shrinks just enough to make everything a little too tight. Any suggestions on how to fix this?