They both get carried. Grizzlies are normally found on the trails leading up to the alpine, a lot more than in the alpine. For those walks, and for soothing me in a tent at night, I prefer the 9.3X62. And living in BC I get to do that annually.
It weighs 7 pounds 8 oz, only 3 oz more than the 30-06 (old M70 Fwt in a Brown Kevlar stock) so one is as easy to carry as the other.
For antelope, not that I have hunted them much, I would be more likely to take a 243AI or 280. But the 9.3 is beyond proven to 500 yards.
Check the ballistic coefficient of that 9.3 Accubond, and run some numbers for yourself. It is impressive.
That 9.3 is a great idea down your way. You guys have more bears than we do, and now that they are not being hunted, human/bear conflicts are already up. Sounds like a nice rifle.
