Re: Which to Saskatchewan?
I'm a fan of both calibers, but being an old guy, I trust the .270. You got some real good pieces of advice about being sure the rifle is only very lightly lubricated, particularly inside the bolt. I've seen Weatherby's with the bolts full of heavy grease. One locked up the firing pin at -18 deg F. I also like the advice about whichever scope is the best in low light / poor visibility. I would be hesitant to change the scopes at this late date, so the scope would also be a tie-breaker for me. The .270 Win ammo would be available if your ammo doesn't make it, but I don't know what to tell you about assuring that Canadian Customs will pass your rifle. It should be routine, but......
One more thing. Try to have a zero as near as possible to the temperatures the rifle and ammo will be subjected to on the hunt. It should be warmer inside a stand, so it may not matter at 100 yds, but at longer range, a warm weather zero could cause a low hit, or even a miss.
Now, having said that I like both the calibers you mentioned, I have to add that my choice would be a larger cartridge. My go-to rifle is a .30 x .378 with 200gr Accubonds. I'm not a great shot, and I suck at doping wind, so I compensate by using big fast bullets. Years ago, Connie Brooks at Barnes told me I was the only person who had ever asked if they would make some 400 -500gr .458 cal boattail X bullets.
Good luck and good hunting! Tom
Texas State Rifle Association Life Member
NRA Endowment Life Member
A big fast bullet will beat a little fast bullet every time