I also say 280AI with 160 class bullets for everything except that big moose or big bear in which case I would take the Sako. I applaud the scope choice for the big bore
The recoil isn't even horrible on the 300, I just keep thinking it should be and it's distracting me from holding 3 rds into a good group with that pencil barrel lolYou shoot the 280 better. I say go that way. It works on moose and elk. If you ever go for big bear or tougher game, the 9.3x62 will work.
The real answer is keep them all and put a MB on the 300 so it's useable.