[Gritty]

...a "great white hunter" type who led big-game safaris, and had to act as "stopper shooter" in case the client failed a kill. He said that jaguars were the most dangerous game, and he chose No.1 buck, as the greater number of wound channels gave more blood-loss and quicker kill/stop.

Yes. That was an American Big Game guide and hunter, Peter Hathaway Capstick. He recommended No.4 buck as the best load to stop a wounded jaguar in mid-air who was leaping for your throat. He had to do it a number of times and it never failed.

Peter Hathaway Capstick. His books are some of the absolute best in print if you love true adventure and his story telling is unsurpassed.

[mcshot]

Along the same line SEAL Conrad (Connie) Watson in the book POINT MAN favored 5 shot as the best shot size for entry and close combat.

[Wonder Warthog]

That must be the guy, and I must have mis-remembered the specific size of buckshot. Heck, I read the story in an “outdoorsy” magazine in a barber shop going on forty years ago.