Charges For 13-Inch Mortar-Bombs.
| Charge. | 13-Inch. |
| lbs. oz. | |
| Of shell filled | 11 0 |
| To burst shell | 6 0 |
| To blow out fuze | 0 6 |
| Ordinary service-charge | 7 0 |
| Incendiary, match, or other composition | 0 8 |
Ranges with Sea-Coast 13-Inch Mortars, 20° Elevation.
| Charge. | Mean Time of Flight. | Least Range. | Greatest Range. | Mean Range. |
| Lbs. | Seconds. | Yards. | Yards. | Yards. |
| 4 | 8. | 840 | 877 | 869 |
| 6 | 9.5 | 1209 | 1317 | 1263 |
| 8 | 11.66 | 1653 | 1840 | 1744 |
| 10 | 12.50 | 2010 | 2128 | 2066 |
| 12 | 14.25 | 2369 | 2688 | 2528 |
| 14 | 15.25 | 2664 | 2780 | 2722 |
Ranges with 13-Inch Mortars, at 45° Elevation.
Weight of Shell, 200 lbs.
| Charge. | Flight. | Fuze. | Range. | ||
| Lbs. oz. | Seconds. | Inches. 10ths. | Yards. | ||
| 7 | 21.4 | 4 | 2 2/3 | 2190 | |
| 7 | 8 | 22.4 | 4 | 4 | 2346 |
| 8 | 23.2 | 4 | 6 | 2480 | |
| 8 | 8 | 23.8 | 4 | 7 1/2 | 2600 |
| 9 | 24.4 | 4 | 8 3/4 | 2734 | |
| 9 | 8 | 24.9 | 4 | 9 3/4 | 2853 |
| 10 | 25.4 | 5 | 1 | 2958 | |
| 10 | 8 | 25.9 | 5 | 1 3/4 | 3026 |
| 11 | 26.3 | 5 | 2 1/2 | 3150 | |
| 11 | 8 | 26.7 | 5 | 3 1/2 | 3246 |
| 12 | 27.0 | 5 | 4 | 3327 | |
| 12 | 8 | 27.4 | 5 | 4 3/4 | 3404 |
| 13 | 27.7 | 5 | 5 1/2 | 3470 | |
| 13 | 8 | 28.0 | 5 | 6 | 3552 |
| 14 | 28.3 | 5 | 6 1/2 | 3617 | |
| 14 | 8 | 28.5 | 5 | 7 | 3681 |
| 15 | 29.0 | 5 | 8 | 3739 | |
| 15 | 8 | 29.1 | 5 | 8 1/4 | 3797 |
| 16 | 29.2 | 5 | 8 1/2 | 3849 | |
| 16 | 8 | 29.4 | 5 | 8 3/4 | 3901 |
| 17 | 29.6 | 5 | 9 | 3949 | |
| 17 | 8 | 29.8 | 5 | 9 1/2 | 3997 |
| 18 | 29.8 | 5 | 9 3/4 | 4040 | |
| 18 | 8 | 30.0 | 6 | 4085 | |
| 19 | 30.2 | 6 | 0 1/4 | 4123 | |
| 19 | 8 | 30.3 | 6 | 0 1/2 | 4160 |
| 20 | 30.5 | 6 | 1 | 4200 | |