Hunted bears twice in SE Alaska some years ago. Cruised the bays and inlets plus walked into several areas. Outfitter was very adamant about calibers, bullets and scopes he wanted us to use. Nothing under 338, with heavy preference to 375 or 416. Bullets were to be soft points like Hornady or Woodleigh and scopes had to be very good in extremely low light. Swarovski or similar with thick reticles.