However, with much wider availability, and the higher BC (ballistic coefficient) .30 caliber bullets of today, the power gap between the two cartridges has been decreased.

One version of its origin is that it was designed by Colonel Townsend Whelen when he was commanding officer of the Frankford Arsenal.

[3][4] The 35 Whelen was designed by James Howe, of Griffin and Howe, partially in response to letters from Leslie Simpson and Stewart Edward White, suggesting that a good all-round rifle for African use would be one of 333 to 350 caliber, with a bullet of 250- to 300 grains (ideally 275 at 2500 fps.

It has killed, with aplomb and efficiency, all of the trophy animals in the world, with the possible exception of the “Big Three” (elephant, rhinoceros, and cape buffalo.)

Although not legal in certain parts of Africa for dangerous game (some countries require that rifles of at least 375 or 400 caliber be used,) solid nose bullets are available so that, in a pinch, it would probably serve.

With the correct bullet choice, this cartridge is suitable for virtually all thin-skinned large and dangerous game.

The European designation for this cartridge would be 9x63mm; with its wide bullet selection and high muzzle energy it is in the same echelon as the 9.3×62mm.