The website needs help, but the info was interesting.
https://demigodllc.com/articles/7.62x39 ... ndard/?p=1It's sometimes hard to look past the most common loading to see a cartridge's full potential. The 7.62x39 mm is a good example of this phenomenon. The ubiquitous military loadings of the 7.62x39 were state of the art in the 1940's but have lackluster performance today. In this article I'll show you three strengths of the 7.62x39 which are largely ignored by its users: good performance in short-barreled rifles (SBR); the use of modern and heavy projectiles which have near ideal terminal performance; and heavy subsonic loads for suppressed use.