10mm Auto
Although it was selected for service by the Federal Bureau of Investigation ( FBI ) in 1989 from the aftermath of the 1986 FBI Miami shootout , the cartridge was later decommissioned ( except by the Hostage Rescue Team and Special Weapons and Tactics Teams ) after their Firearms Training Unit eventually concluded that its recoil was excessive in terms of training for average agents and police officers' competency of use and qualification , and that the pistols chambered for the cartridge were too large for some small-handed individuals . 
<triplet> 1986 FBI Miami shootout <subj> Federal Bureau of Investigation <obj> participant