Having had several 416 Rem rifles since it was introduced, I think any of the bullets mentioned should do just fine on buffalo. My own experience has been with original TBBCs and Sledge Hammer solids, but expect the current versions to be just as reliable. That said, if I were going today I’d go with a 350gr Barnes TSX. I’ve always reloaded with R15 and never found another powder to be any better. Always worked up my loads in warm to hot weather so it’s temp sensitivity has never been an issue. Also used it in my 450 Dakota with zero issues.
