NATO Designations – All small arms ammunition is listed by their NATO designation first, and a common name following, if available. NATO Designation is first the projectile diameter in mm, the cartridge case length in mm, and a suffix letter if the round is; Semi-rimmed (Sr), Rimmed, (R), Belted (B), or has a Rebated rim (Rb). There is no suffix letter if the round is rimless.
4.5x39mmR SPS
5.45×17.8mm – 5.45x18mm PSM Ball
5.6x44mm – XM 144 Flechette
5.7×10.7mmR – .22 Short
5.7×15.6R – .22 Long Rifle High Velocity
5.7×15.6R M24 – M24 .22 Long Rifle
5.7x28mm SS190
6.35×15.5mmSR – .25 ACP
7x20mm – 7mm Nambu
7.62x25mm Tokarev
7.62×35 mm – SP-2
7.62×35 – SP-3
7.62×41 mm – 7N36
7.62×41 – SP-4
7.62×63 – PZAM
7.63x25mm – 7.63 Mauser
7.65x17mmSR – .32 ACP
7.65x22mm – .30 Luger
8×21 mm – 8mm Nambu
9x17mm – .380 ACP
9x18mm – 9mm Makarov PM Ball
9x19mm – 9mm Parabellum
9x20mmR – .38 Smith & Wesson, .38/200 (Mk IIz)
9x22mmR – 9mm Japanese Type 26
9x23mm – 9mm Steyr M1911
9x29mmR – .38 Special
9x33mmR – .357 Magnum
11x25mmR – .44 Smith & Wesson Russian
11x33mmR – .44 Magnum
11.43x19mmR – .455 Revolver (Webley) Mk II
11.43x23mm – .45 ACP
11.43×23.5mmSR – .455 Webley Automatic
11.43x32mmR – Model 1882 .45 Revolver
11.43x33mmR – .45 Long Colt
12.7x22mmR – .50 Remington Navy
12.7x133mm – Mark 59 Underwater Projectile
13.3x48mm – QSPR