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.
10.4x76mmR – .410 3 inch
15.6x70mmR – 20 Gauge 2 ¾ Inch #7 ½ Shot
15.6x70mmR – 20 Gauge 2 ¾ Inch #3 Buckshot
15.6x70mmR – 20 Gauge 2 ¾ Inch Rifled Slug
15.6x76mmR – 20 Gauge 3 inch #2 Buckshot
16.9x70mmR – 16 Gauge 2 ¾ inch #8 Shot
16.9x70mmR – 16 Gauge 2 ¾ inch Rifled Slug
18.5x67mmR – 12 Gauge 2 5/8 inch 00 Buckshot
18.5x70mmR – 12 Gauge 2 ¾ inch #8 Shot
18.5x70mmR – 12 Gauge 2 ¾ inch M257 #4 Buckshot
18.5x70mmR – 12 Gauge 2 ¾ inch 00 Buckshot
18.5x70mmR – 12 Gauge 2 ¾ inch M19 00 Buckshot
18.5x70mmR – 12 Gauge 2 ¾ inch Rifled Slug
18.5x76mmR – 12 Gauge 3 inch Magnum #2 Steel Shot
18.5x76mmR – 12 Gauge 3 inch Magnum 00 Buckshot
18.5X79mm AAI CAWS Flechette
19.5x76mmB HK CAWS #2 Tungsten
19.5x76mmB HK CAWS 000 Buckshot
19.5x76mmB HK CAWS Flechette
19.7x73mmR – 10 Gauge 2 7/8 inch 0 Buckshot
19.7x89mmR – 10 Gauge 3 ½ inch Magnum #4 Steel Shot
19.7x89mmR – 10 Gauge 3 ½ inch Magnum #4 Lead Shot
19.7x89mmR – 10 Gauge 3 ½ inch Magnum 00 Buckshot