The Head is of gun-metal, the outside following the ogival contour and being provided with a screw-thread for securing it in the body. In the centre of the lower surface is fixed a small point forming a striker for the fulminate.
RANGE TABLE FOR 1.65-INCH HOTCHKISS MOUNTAIN-GUN.
- Kind of powder, Dupont H. N
- Weight of charge, 5½ oz
- Weight of shell, 1 lb. 15 oz
- Initial velocity, 1,298 ft.-sec
- Angle of jump, + 22 minutes
- Length of line of sight, 17.93 inches
| Range. | Elevation. | Angle of Fall. | Sight- marks. | Drift. | Drift- marks. | Time of Flight. | Remaining Velocity. | Dangerous Space for Infantry. |
| Yards. | ° ′ | ° ′ | Inches. | Yards. | Inches. | Sec. | Feet. | Yards. |
| 100 | -0 12 | 0 12 | 0.000 | 0.1 | 0.008 | 0.1 | 1,243 | 100 |
| 200 | 0 00 | 0 23 | 0.000 | 0.1 | 0.009 | 0.4 | 1,191 | 200 |
| 300 | +0 11 | 0 35 | 0.057 | 0.2 | 0.012 | 0.7 | 1,125 | 180 |
| 400 | 0 23 | 0 48 | 0.120 | 0.3 | 0.014 | 1.0 | 1,099 | 131 |
| 500 | 0 35 | 1 02 | 0.183 | 0.4 | 0.014 | 1.3 | 1,066 | 102 |
| 600 | 0 49 | 1 16 | 0.255 | 0.5 | 0.015 | 1.6 | 1,037 | 83 |
| 700 | 1 03 | 1 31 | 0.328 | 0.7 | 0.018 | 1.9 | 1,007 | 69 |
| 800 | 1 17 | 1 53 | 0.401 | 0.9 | 0.020 | 2.2 | 984 | 56 |
| 900 | 1 32 | 2 16 | 0.479 | 1.2 | 0.024 | 2.5 | 961 | 46 |
| 1,000 | 1 48 | 2 39 | 0.562 | 1.5 | 0.026 | 2.8 | 942 | 40 |
| 1,100 | 2 04 | 3 02 | 0.646 | 2.0 | 0.033 | 3.1 | 922 | 34 |
| 1,200 | 2 21 | 3 27 | 0.735 | 2.5 | 0.037 | 3.4 | 902 | 30 |
| 1,300 | 2 39 | 3 53 | 0.829 | 3.2 | 0.044 | 3.8 | 886 | 27 |
| 1,400 | 2 57 | 4 22 | 0.923 | 3.9 | 0.050 | 4.1 | 869 | 24 |
| 1,500 | 3 16 | 4 48 | 1.022 | 4.6 | 0.055 | 4.5 | 853 | 22 |
| 1,600 | 3 36 | 5 19 | 1.127 | 5.5 | 0.062 | 4.9 | 837 | 20 |
| 1,700 | 3 57 | 5 50 | 1.237 | 6.1 | 0.065 | 5.3 | 823 | 18 |
| 1,800 | 4 18 | 6 22 | 1.347 | 7.0 | 0.070 | 5.7 | 810 | 16 |
| 1,900 | 4 39 | 6 55 | 1.457 | 8.0 | 0.076 | 6.1 | 797 | 15 |
| 2,000 | 5 01 | 7 28 | 1.572 | 9.0 | 0.081 | 6.5 | 784 | 14 |
| 2,100 | 5 23 | 8 02 | 1.688 | 10.0 | 0.086 | 6.9 | 771 | 13 |
| 2,200 | 5 47 | 8 36 | 1.814 | 11.0 | 0.090 | 7.3 | 758 | 12 |
| 2,300 | 6 11 | 9 14 | 1.941 | 13.0 | 0.102 | 7.7 | 748 | 11 |
| 2,400 | 6 36 | 9 57 | 2.073 | 15.0 | 0.113 | 8.1 | 735 | 10 |
| 2,500 | 7 01 | 10 36 | 2.205 | 17.0 | 0.123 | 8.5 | 722 | 10 |
| 2,600 | 7 27 | 11 18 | 2.342 | 20.0 | 0.139 | 8.9 | 712 | 9 |
| 2,700 | 7 53 | 12 00 | 2.480 | 22.0 | 0.151 | 9.3 | 702 | 9 |
| 2,800 | 8 20 | 12 42 | 2.624 | 24.0 | 0.155 | 9.8 | 689 | 8 |
| 2,900 | 8 48 | 13 26 | 2.773 | 26.0 | 0.163 | 10.2 | 679 | 8 |
| 3,000 | 9 17 | 14 10 | 2.928 | 28.0 | 0.170 | 10.6 | 669 | 7 |
| 3,200 | 10 15 | 15 39 | 3.239 | 35.0 | 0.199 | 11.6 | 650 | 6 |
| 3,400 | 11 16 | 17 11 | 3.569 | 41.0 | 0.221 | 12.6 | 630 | 6 |
| 3,600 | 12 20 | 18 45 | 3.917 | 48.0 | 0.245 | 13.5 | 610 | 5 |
| 3,800 | 13 27 | 20 20 | 4.284 | 57.0 | 0.277 | 14.5 | 591 | 5 |
| 4,000 | 14 35 | 22 00 | 4.996 | 70.0 | 0.325 | 15.5 | 571 | 4 |
If the axle of the carriage be not horizontal, multiply the difference of level of the wheels in inches (or the inclination of the trunnions in degrees) by the elevation in degrees for the given range; the result will be the deflection in minutes to be applied on the side of the higher wheel.
Fig. 9.
When the shell is fired, the plunger is forced to the rear, driving the safety-plug into the shell. The small wires being free to let the plunger drive forward, hold it steadily with the rotation of the shell, and keep it from dropping forward on the descending arc of a high trajectory. On impact the plunger drives forward, and the little magazine is exploded by contact with the point.
A Frankford Arsenal point percussion-fuze, small (model 1894), weight 2¼ oz., is now made for 1.65-inch ammunition. It is similar to the fuze for the 3.2-inch field-gun.