I am getting some frozen in place cases. It _seems_ like I have a bunch of water vapor in the chamber while the action is cycling and after 5 shots or so the new round won't seat all the way into the chamber becuae of ice crystals I think, so the bolt won't close all the way, so the firing pin doesn't when I pull the trigger.
I am thinking I could try a different lube, or maybe change my load around.
I am shooting .223 Remington, Winchester brass, Varget powder, various bullets 50-65 grains, charge weights 0.5 to 1.0gr under max and CCI450 (small magnum rifle) primers.
I am getting good ignition and consistent groups; but I think incomplete combustion together with the freeze-up.
I am going to try the CCI400 primer (small notmagnum rifle) since I have hundreds of them, and it can't hurt might help.
I am wondering about a hotter primer maybe? Maybe the Federal small magnum rifle?
Maybe a different lube?
Short of buying a manual bolt action rifle, what else can I try to keep my AR dependable at -20F to -30F?