I am a fan of SmartWool's 150gm2 crew top and bottoms for those temps. A great buy can be had on "camofire" for the Core 4 Merino in the 190gm2.


7mm-375Ruger
Stiller TAC 300
Broughton 5C 9tw @ 28"
Jewell Trigger
Greybull Precision stock
180VLD @ 3145fps