I'm one of those that has just read and hasn't shot a 10mm, but my philosophy with pistols is that unless you need the extra penetration that greater power gives you, you should only accept an increase in recoil if it comes with an increase in caliber. Thus, I will take a .40 S&W over a 10mm any day, as my intended platform is an HD round, which will not involve shooting armored targets, bears, or people behind brick walls. So for me, the 10mm is a useless cartridge. For someone who has an application for the extra power and accuracy, I could see it being useful.