As mentioned, the 30-06 with premium bullets is a sensible minimum. I'd take that even further, 308 Win with a 180gr Partition or accubond. Keep shot distances between 75 and 175 yards, ensure placement is surgical. I like the 375 Ruger m77, very portable, accurate, reliable and gives good performance downrange. Doesn't kick any worse than a 300 Win Mag either
I'll also add - big difference between shooting a grizzly across a slide at 150 yards, and going into the willows looking for him after the shot. I'm pretty sure any cartridge from 6.5 Swede on up, with good bullets, will kill a bear. But what do you want in your hands when you're wading through this #### following the blood trail, if there is one?
![]()
rifle in the bag and grizzly hunting?