your right, the brown bears could be an issue. But I have a friend from Alaska and he claims that he never used anything bigger than a Ruger M77 270 win, which he still has and uses to hunt. in fact, its the only rifle he has..It will do the job on moose assuming you are not taking a 300+ yard shot. It would be the bears in moose country that would give me reason to evaluate my choice more closely.
I recently picked up some hammer bullets that shoot very tight groups. I have not tried them in the field yet. TSX's are my mainstay.I agree^^^^^.
I have a 257 Weatherby, and have used it very effectively for clean kills with several good-sized spring black bears over the years. I handload 100grn TSX's, and they hold together exceptionally well at those laser-beam muzzle velocities...all the kills were DRT. One nearly seven-footer dropped right in place with a heart shot, as if someone unplugged him, and he never moved again once hit. I really do like that cartridge, and it is extremely accurate in my rifle.
That said, (as mentioned by others) it is not my personal choice for moose hunting, and stays in my gun-safe during moose season...that is a personal choice of course. I just feel that there are more applicable cartridges and caliber alternatives that are more appropriate choices for fall moose hunts up here. No offense...to each his own...we all make our own choices.
If you have the right barrel twist, you now have plenty of heavy high BC bullets. I built my .257 WBY (1:7") to primarily propel the BJ 131s, Berger 133s/135s, and the Black Hole145s. The heavy .25 cal bullets are a game changer. Below is the 145:is a 257 Weatherby a viable caliber for Moose?