I understand that the “original” cartridge for the AK-47 was a 7.62x41mm, not the 7.62x39mm we all know and love. Does anyone have any data on this cartridge? Pics, headstamps, dimensions? Was this cartridge also called the M-1943 and was it the cartridge reportedly used in the first SKS-45 rifles that were combat tested during WWII? Are any examples of this cartridge in private colelctions or are they only known in Russian museums? I’m most curious about where the 2mm case length difference is. Is it in the case body or the neck? I was thinking about resizing a 7.62x45mm case to 7.62x39mm dimensions and trimming it to 41mm for comparison and display purposes, but only if it would approximate the original cartridge dimensions. Any help would be greatly appreciated!