Friend of mine just got back from Africa (Dande North in ZIM) shot two buffalo with a 416 Rigby and 350gr TSX. TSXs, like Porsche there is NO substitute.
Good friend killed a 41" buff in Zim last year. Used the 400 TSX out of his .416 Rigby RSM. PH packed a push feed M-70, .416 Rem. He liked the big Ruger but said, in his opinion, it was too heavy.
What's your thinking, 350 TSX vs. 400 TSX out of a .416? This buff was hit with a raking shot, didn't go thru.
Another friend is building a .416 Rem for a buff hunt next year. I'm helping him with the technical stuff. Will reload for that hunt.
DF