He had his fingers in a lot of pies!
Very talented man indeed - did a lot of experimentation work as well.
The 460G&A is another of his creations, was even better than the .458Lott.
Its a brilliant round for buffalo etc with a 500gn pill at 2300fps, all based on the .404Jeffery case.
In my humble opinion, more efficient than the Weatherby or later Rigby rounds!