Ive got that exact same Browning rifle as above but i had mine punched out to 348 AI
.348 WCF-AI, yep, some claim 500 fps more velocity with the AI. Whatever it adds would probably more than make up for the 4" shorter barrel's MV loss.
Near straight taper of the .450 Alaskan-AI can cause feeding problems.
Not so much with the .348 WCF-AI, and adds case life ?