I have a BLR in 308 and a 45-70 Marlin XLR. I like both. However the BLR is as accurate as a bolt gun, fast handling.
Do you reload? If so the BLR in 358 using Noslar partitions or Barnes TSX bullets in a 225 gr should handle a bear in a bad situation, especially with the quick handling BLR. Under 100-150 yards the 45-70 should work, but the 358 will give you more range like 200-250 yards, especially if you are going after caribou, goat or sheep. It should also work ok on moose from what I have read.