Jeff Cooper was the original concept developer of the round, which he called the ".40 Super".
When FFV Norma AB (now Norma Precision AB) designed the cartridge at the behest of Dornaus & Dixon for their Bren Ten pistol, the company decided to increase the power over Cooper's original concept. The case was derived from the .30 Remington rifle round, cut down and the walls straightened to accept the same diameter bullet as the much older .38-40 Winchester. So, either the Swedes at Norma or Michael Dixon/Thomas Dornaus named it.
Yea lets change the name!!
that's what we need more confusion in the cartridge nomenclature area.
Hey, why not just go ahead and change all the names of the streets as well, nothing like a little more confusion.
How about the parks too!
No I don't think so. If someone ask me what caliber my gun is and I say 40 magnum. They are going to wonder why in the hell didn't I go ahead and get a 44 mag. However when I drag out my Long slide 1911 and they ask and I reply 10mm, I get a lot of yeah!, Nice, brutal, hummm. I like to hear all the surprised noises people make when I say 10mm. Oh and the closest round ballistics wise is the 41 magnum.
"At this time, only three countries—Burma, Liberia, and the US—have not adopted the International System of Units (SI, or metric system) as their official system of weights and measures." We should point out that even these three countries do use elements of the metric system.