Found this while researching some stuff for my book... "But the biggest drawback to the cartridge, and the one that largely contributed to it falling out of favor was the enormous shock wave that was produced when the cartridge was fired. When firing the gun, the shooter could actually feel the impulse hit their face and travel up their arm. After a while, some people began to experience Tendinitis in their wrists and other soreness in their wrists and arms. For a lot of people the trade-off from reduced felt recoil and a quicker second shot wasn't worth the potential damage that could be caused to their hearing and wrists." Interesting... I guess it's because other high-recoil guns aren't shot as much as the 9x25... never seen anyone pound through box after box of .50 AE.