I have done my fair share of cold weather hunting, and long range target shooting in cold weather.
Clothing in general:
- wool wool and wool, do use wool underwear
- dress in layers
- use something completely windproof as the outer layer
- wool socks and mittens, windproof outer mittens, mittens not gloves
- a good cap/hat that is windproof and covers your ears, watch the russians
- preferably, sit in a windsack
- a reindeer/caribou hide under your butt is better than anything "modern"
- shelter from the wind, you can dig in, or make a snow wall, or use a tarp, but shelter from the wind
- large shoes
- spare dry socks
- glasses will shield face from wind and lessen heat loss
- so will a bandana/shemagh
- never ever get sweaty
- keep your hands in the mittens, or on your body
- if on a LR hunt, or at anything but close up hiding, you can make a small fire if the wind is in your face,
- heavy things that fall in snow, cartridges for example, are hard to find
- Thermos can and hot chocolate, fat food, and warm food
- do the math, bullets drop alot more
- @ LR, VERIFY shooting in similar air density, i have had nice and accurate summer loads disappear on me in high density winter air, seen good loads hit sideways, etc.
- winter and cold is often calm, very good accuracy can be had
- consider magnum primers if not already using, ES can increase in CW
- VERIFY velocity in actual temperature, Vo variation in temperaure is a complicated beast.
- make SURE there is no oil in the trigger... or on the striker spring
- keep oil on weapon to a minimum, dry on outside
- shooting can throw up a large amount of snow, enough to make 2. shot impossible, snow on lenses etc. Use a suppressor, or a 4'x4' mat under muzzle.
- dry snow on a warm or oily rifle in CW is a mess
- and keep your breath away from lenses