9.3x57

I don't think you need worry about starting a war, I do have quite a bit of experience with the 455 Webley on game but would agree that none of the pistol cartridges are anything to write home about on animals at least. Even the 44 Magnum in a Ruger Carbine was not exactly a king hitter compared to a decent rifle cartridge, even my early rifle in 32 Remington I used as a teenager to take a lot of deer and goats was miles ahead of the 44 Magnum cartridge.

Perhaps in some comparison to your experience in using the various pistol cartridges to kill stock, there is an interesting article in the 4th Edition of COTW called "Handgun Lethality". The article covers the US Army Tests of 1904 where a variety of tests were carried out with several cartridges of the day from the 30 Luger, 9mm Luger, 38 Colt Army, 38 Colt Auto, 45 Colt Auto, 45 Colt Rev,455 Colt and 476 Colt. The tests on cattle and horses was carried out in the Chicago stockyards and involved shooting into the lung and intestinal areas from a range of 3 feet to test for shock on the animals. No shots were fired into vital organs or the brain.

The 45 Colt revolver show great shock and distress and dropped the animals by the 4th or 5th shot while the 455 and 476 dropped them by the third shot. It was noted that those shot by the larger calibres would begin to bleed from the nose and mouth by the 2nd or 3rd shot while this did not happen with the smaller calibres.

From this series of tests the Army chose the 45 Auto which while not as good as the 45 revolver and 455 suited the handgun better that they wanted.