| Muzzle velocity (ft/s) | Range of barrel length to which data applies (inches) | Approximate change in velocity for each 1 inch change in barrel length (ft/s) |
| Up to 2000 | 20-26 | 5 |
| 2001-2500 | 20-26 | 10 |
| 2501-3000 | 20-26 | 20 |
| 3001-3500 | 20-26 | 30 |
| 3501-4000 | 20-26 | 40 |
| Muzzle velocity (ft/s) | Range of barrel length to which data applies (inches) | Approximate change in velocity for each 1 inch change in barrel length (ft/s) |
| Up to 2000 | 20-26 | 5 |
| 2001-2500 | 20-26 | 10 |
| 2501-3000 | 20-26 | 20 |
| 3001-3500 | 20-26 | 30 |
| 3501-4000 | 20-26 | 40 |