I have a February Tag for Muskox

Which Rifle/load? This is what I have:

Browning A-bolt 30-06

Or

CZ 550 9.3x62, Shoots handloads 286g partition at 2550. Or 250g accubond at 2700fps

Or

35 Whelen Handi Rifle, handloads 275g woodlieghs at 2550fps. Or 225g partition at 2780fps


They all shoot straight, The Handi rifle breaks down

I am not worried about the kick

1.) I am most worried about the action working in the cold
2.) bringing enough gun
3.) the ammo getting lost in transit

Thoughts?