NY State Police dropped the 9mm and adopted the 45 GAP. They had lost several troopers due to multiple failures of the 9mm to instantly neutralize a threat. Not much to argue about.
If you want to discuss expensive ammo, check out 45 GAP. However, it has proven itself several times in service.
"As of January 2018, New York State Troopers are issued the Glock 21 Gen4 chambered in .45 ACP as the service pistol." - Wikipedia
