I doubt you're getting any shrinkage, but only you can attest to that. lol
I'd break it all the way down, and spray and scrub it all the way clean. A lot of times when a gun acts more sluggish in the cold it's because there's too much oil and residue on it. Happens a lot to people who just continually spray/squirt more oil on their guns throughout the year instead of really cleaning them. Oil gets gummy when it's real cold and that's not good for moving parts. I have a couple semi-autos that I run nearly dry during the real cold months. Just the tiniest touch of oil on everything except the trigger assembly. Could be something else, but I'd try that first.
I'd break it all the way down, and spray and scrub it all the way clean. A lot of times when a gun acts more sluggish in the cold it's because there's too much oil and residue on it. Happens a lot to people who just continually spray/squirt more oil on their guns throughout the year instead of really cleaning them. Oil gets gummy when it's real cold and that's not good for moving parts. I have a couple semi-autos that I run nearly dry during the real cold months. Just the tiniest touch of oil on everything except the trigger assembly. Could be something else, but I'd try that first.
