I grew up and hunted in Northern Alberta and Quebec. I've spent hundreds of hours hunting bear, moose, caribou and deer with my 8x57r DR. In below zero condition I use silica to lube any interior parts and a good grease on the outside.

When I inheritred the gun it was in 80% condition, nows it's about 70%. It shoots 5" at 200m and I'd rather use it then any of my bolts.

I've never had it fail to fire, but it did freee up once. It was in -30 weather in the Alberta oil patch. I got the moose but two shots was all I had. I had to thaw it out in the wall tent but I was eating tenderloin at the time so ....