Didn't the FBI have the 10mm cartridge developed because the 9mm was inadequate? Miami shoot-out?
Also, if you're so inexperienced as a handgun shooter, that the biggest round you can effectively handle is a 9mm, you have no business using a hand gun for defense purposes. It doesn't take that much training to become proficient with any semi-auto pistol.
And if you need 17 rounds of ammo, because 14 or 15 isn't enough to get the job done, you're really not proficient enough to use a handgun for self defense either.
No the 10mm was already developed when the tests were done. The FBI adopted the 10mm with 180 grain bullets at 1,000 fps, which led to S&W developing the 40 S&W or 10mm short. The 40 pushes the 180 @ 1,000 fps same as the down loaded 10mm but the 40 needs about 35,000 psi to get there. The higher pressure is why the 40 S&W is hard on the pistols it is chambered in.
I got banned on another web site for a debate that happened on this site. That's a first
