The following are tables for shot size and an average # pellets per cartridge for a 12 GA shotgun cartridge.
| Shot Sizes | |
|---|---|
| Number | Dia. |
| BB | 0.180 |
| B | 0.175 |
| 1 | 0.160 |
| 2 | 0.150 |
| 3 | 0.140 |
| 4 | 0.130 |
| Buckshot Information | |||
|---|---|---|---|
| Shot Size | # Pellets (12 GA) | ||
| Number | Dia. | 3" Mag. | 2 3/4" |
| 000 | 0.360 | 10 | 8 |
| 00 | 0.330 | 15 | 9 |
| 0 | 0.320 | -- | 12 |
| 1 | 0.300 | 20 | 16 |
| 2 | 0.270 | 18 | -- |
| 3 | 0.250 | -- | 20 |
| 4 | 0.240 | 41 | 27 |