Hey there, I also work in the Arctic and carry my Mav88. We have both Grizzly and Polar bear because I work a bit inland. Hasn't failed me yet. Just like the others have said, do not trust an auto loader up there. They can do some funky stuff when you take it out of a 20 degree truck and instantly subject it to -68. I just recently have switched to 12 Gauge Hornady SST Sabot Slug 2-3/4" 300 Grain 2000 fps. I chose a shotgun over a rifle do to the fact that, when you're all bundled up and working outside a bear can get up on you pretty darn fast and i wanted something that would give me improved maneuverability for close quarters emergencies.
EDIT: Forgot to mention that if you're using the SST Sabot in a smooth bore and are 1500 FPS or over, invest in a rifled choke tube or you stand a very very good chance of having the projectile key hole on you.
EDIT: Forgot to mention that if you're using the SST Sabot in a smooth bore and are 1500 FPS or over, invest in a rifled choke tube or you stand a very very good chance of having the projectile key hole on you.
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