This past weekend we had our club shoot, air temp was 12 degrees, very little wind and sunny. I usually spit patch, that wasn't going to work. I melted some rendered coon fat and dipped a roll of ticking patching in. Squeezed most of it out. Let it dry overnight.
The shoot on Sunday, the patches worked great. I cut them at the muzzle, easier for me to deal with a strip of cloth and a knife than trying to pick up individual patches in the cold. We shot 15 shots, three targets. A break to pull and post between each target. I never swabbed and the last shot loaded as easy as the first. No real change in accuracy, as far as I could tell. Just off hand shooting. Cleanup was very easy.
I am definitely happy with my first use of coon fat. I have a pile on the fur shed floor I will be rendering down into smaller containers. I would definitely recommend it experiment with coon fat as a lube, especially in cold weather or for hunting when the load stays in the gun for some time.