A couple of things that I've done to a new 760/7600 is to run some dummy rounds through them to slick them up and see where the wear points are. I make up the dummy rounds with a case, no powder, a pencil eraser in the primer pocket, and a Remington pointed Core-Lokt bullet. I load them in the magazine(s) for the rifle and run them through the action by dry firing. After a couple hundred rounds of this activity, you will see bright spots at the wear points. I then lube those bright spots with Moly Slide. Using this process, I've never had a problem with any of my pumps in cold weather.
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