When the piece is discharged the plunger-sleeve overcomes the resistance of the safety-ring and carries it to the rear; the diameter of the ring is slightly increased during its passage along the spindle, and when in the proper position for so doing it fits partly in both grooves (t and t′), binding sleeve and spindle firmly together. The point of the firing-pin now projects beyond the plunger-sleeve and the fuze is armed. When the projectile strikes, the complete plunger is thrown forward, the point of the firing-pin pierces the restraining-disk and ignites the composition.
[Fig. 47] shows the position of the parts before the piece is discharged, and [Fig. 48] during the flight of the projectile.
RANGE TABLE FOR 3.2 INCH B. L. RIFLE.
- Shrapnel, 13.5 pounds
- Muzzle velocity, 1685 ft.-sec
| Range. | Sight Elevation. | Variations. | Time of Flight. | Fuze Scale. | Change in Height of Burst, 1 minute elevation | Fall. | Terminal Velocity. | |||||||
| Angle. | Differs from Shell. | Range, 1 minute elevation. | Deflection, 1 division hor. scale. | Divisions at which to cut time-fuze.[5] | Variation in range. 1 subdiv. | Angle. | Inclination, 1 yard in-- | |||||||
| yards. | deg. | min. | min. | yards. | feet. | seconds. | units. | sixths. | yards. | feet. | deg. | min. | yards. | f. s. |
| 500 | 0 | 13 | 1 | 14 | 4.4 | .97 | 0 | 4 | 80 | .4 | 0 | 37 | 93 | 1426 |
| 600 | 0 | 20 | 1 | 13 | 5.2 | 1.18 | 1 | 0 | 78 | 0 | 46 | 75 | 1380 | |
| 700 | 0 | 27 | 1 | 12 | 6.1 | 1.40 | 1 | 1 | 75 | 0 | 56 | 61 | 1335 | |
| 800 | 0 | 35 | 1 | 12 | 7.0 | 1.63 | 1 | 3 | 73 | 1 | 6 | 52 | 1292 | |
| 900 | 0 | 43 | 1 | 12 | 7.8 | 1.87 | 1 | 4 | 71 | 1 | 19 | 44 | 1251 | |
| 1000 | 0 | 52 | 1 | 11 | 8.7 | 2.11 | 2 | 0 | 67 | .9 | 1 | 32 | 37 | 1212 |
| 1100 | 1 | 2 | 2 | 11 | 9.6 | 2.36 | 2 | 1 | 67 | 1 | 45 | 33 | 1176 | |
| 1200 | 1 | 12 | 3 | 11 | 10.4 | 2.62 | 2 | 3 | 67 | 2 | 1 | 28.5 | 1142 | |
| 1300 | 1 | 22 | 3 | 10 | 11.3 | 2.89 | 2 | 5 | 62 | 2 | 17 | 25 | 1110 | |
| 1400 | 1 | 33 | 5 | 10 | 12.2 | 3.16 | 3 | 0 | 62 | 2 | 34 | 22.5 | 1082 | |
| 1500 | 1 | 44 | 6 | 9 | 13.0 | 3.44 | 3 | 2 | 58 | 1.3 | 2 | 52 | 20 | 1056 |
| 1600 | 1 | 55 | 6 | 9 | 13.9 | 3.73 | 3 | 4 | 58 | 3 | 11 | 18 | 1034 | |
| 1700 | 2 | 7 | 7 | 9 | 14.8 | 4.02 | 3 | 5 | 58 | 3 | 30 | 16.5 | 1014 | |
| 1800 | 2 | 19 | 8 | 8 | 15.7 | 4.32 | 4 | 1 | 55 | 3 | 50 | 15 | 995 | |
| 1900 | 2 | 32 | 9 | 8 | 16.5 | 4.62 | 4 | 3 | 55 | 4 | 12 | 13.5 | 978 | |
| 2000 | 2 | 45 | 10 | 7 | 17.4 | 4.93 | 4 | 5 | 52 | 1.7 | 4 | 34 | 12.5 | 962 |
| 2100 | 2 | 59 | 11 | 7 | 18.3 | 5.25 | 5 | 1 | 52 | 4 | 57 | 11.5 | 946 | |
| 2200 | 3 | 13 | 11 | 7 | 19.1 | 5.57 | 5 | 2 | 52 | 5 | 21 | 10.5 | 920 | |
| 2300 | 3 | 28 | 12 | 7 | 20.0 | 5.90 | 5 | 4 | 50 | 5 | 45 | 10 | 915 | |
| 2400 | 3 | 43 | 13 | 7 | 20.9 | 6.23 | 6 | 0 | 50 | 6 | 11 | 9 | 901 | |
| 2500 | 3 | 58 | 14 | 6 | 21.7 | 6.56 | 6 | 2 | 49 | 2.2 | 6 | 38 | 8.5 | 887 |
| 2600 | 4 | 14 | 16 | 6 | 22.6 | 6.90 | 6 | 4 | 49 | 7 | 5 | 8 | 874 | |
| 2700 | 4 | 29 | 17 | 6 | 23.5 | 7.24 | 7 | 0 | 49 | 7 | 34 | 7.5 | 862 | |
| 2800 | 4 | 44 | 17 | 6 | 24.4 | 7.58 | 7 | 2 | 49 | 8 | 4 | 7 | 850 | |
| 2900 | 5 | 1 | 19 | 6 | 25.2 | 7.92 | 7 | 4 | 49 | 8 | 35 | 6.5 | 839 | |
| 3000 | 5 | 18 | 20 | 6 | 26.1 | 8.26 | 8 | 1 | 48 | 2.6 | 9 | 7 | 6 | 829 |
| 3100 | 5 | 35 | 21 | 6 | 27.0 | 8.61 | 8 | 3 | 48 | 9 | 39 | 6 | 819 | |
| 3200 | 5 | 52 | 22 | 6 | 27.8 | 8.96 | 8 | 5 | 48 | 10 | 12 | 5.5 | 810 | |
| 3300 | 6 | 9 | 23 | 5 | 28.7 | 9.32 | 9 | 1 | 47 | 10 | 46 | 5.5 | 801 | |
| 3400 | 6 | 28 | 25 | 5 | 29.6 | 9.68 | 9 | 3 | 47 | 11 | 21 | 5 | 792 | |
| 3500 | 6 | 47 | 26 | 5 | 30.5 | 10.04 | 9 | 5 | 45 | 3.0 | 11 | 56 | 4.5 | 783 |
| 3600 | 7 | 6 | 27 | 5 | 31.3 | 10.41 | 10 | 1 | 45 | 12 | 32 | 4.5 | 775 | |
| 3700 | 7 | 25 | 28 | 5 | 32.2 | 10.78 | 10 | 4 | 45 | 13 | 9 | 4.5 | 767 | |
| 3800 | 7 | 45 | 30 | 5 | 33.1 | 11.16 | 11 | 0 | 44 | 13 | 48 | 4 | 759 | |
| 3900 | 8 | 5 | 32 | 5 | 33.9 | 11.54 | 11 | 2 | 44 | 14 | 28 | 4 | 751 | |
| 4000 | 8 | 25 | 33 | 5 | 34.8 | 11.92 | 11 | 5 | 44 | 3.5 | 15 | 8 | 3.5 | 744 |
| 4100 | 8 | 44 | 33 | 5 | 35.7 | 12.30 | 12 | 1 | 44 | 15 | 49 | 3.5 | 737 | |
| 4200 | 9 | 3 | 33 | 5 | 36.5 | 12.68 | 12 | 3 | 44 | 16 | 31 | 3.5 | 730 | |
| 4300 | 9 | 24 | 34 | 5 | 37.4 | 13.06 | 12 | 5 | 43 | 17 | 14 | 3 | 723 | |
| 4400 | 9 | 44 | 34 | 5 | 38.3 | 13.45 | 13 | 2 | 43 | 17 | 58 | 3 | 717 | |
| 4500 | 10 | 5 | 34 | 5 | 39.2 | 13.84 | 18 | 4 | 43 | 3.9 | 18 | 43 | 3 | 711 |
RANGE TABLE FOR 3.2-INCH B. L. RIFLE.
- Shell, 13.5 pounds
- Jump: 20′ at 1°. 30′ at 10°
- Muzzle velocity, 1685 ft.-sec
| Range. | Site Elevation | Variations. | Time of Flight. | Fall. | Terminal Velocity. | ||||
| Range, 1 minute elevation. | Deflection, 1 division hor. scale. | Angle. | Inclination 1 yard in-- | ||||||
| yards. | degrees. | minutes. | yards. | feet. | seconds. | deg. | min. | yards. | f. s. |
| 500 | 0 | 12 | 14 | 4.4 | 0.96 | 0 | 36 | 95 | 1450 |
| 600 | 0 | 19 | 13 | 5.2 | 1.17 | 0 | 45 | 76 | 1408 |
| 700 | 0 | 26 | 12 | 6.1 | 1.39 | 0 | 54 | 64 | 1366 |
| 800 | 0 | 34 | 12 | 7.0 | 1.61 | 1 | 5 | 53 | 1326 |
| 900 | 0 | 42 | 12 | 7.8 | 1.84 | 1 | 16 | 45 | 1287 |
| 1000 | 0 | 51 | 11 | 8.7 | 2.07 | 1 | 28 | 39 | 1250 |
| 1100 | 1 | -- | 11 | 9.6 | 2.32 | 1 | 41 | 34 | 1215 |
| 1200 | 1 | 9 | 11 | 10.4 | 2.57 | 1 | 55 | 30 | 1182 |
| 1300 | 1 | 18 | 10 | 11.3 | 2.82 | 2 | 9 | 27 | 1151 |
| 1400 | 1 | 28 | 10 | 12.2 | 3.09 | 2 | 25 | 24 | 1121 |
| 1500 | 1 | 38 | 10 | 13.0 | 3.36 | 2 | 41 | 21 | 1094 |
| 1600 | 1 | 49 | 10 | 13.9 | 3.64 | 2 | 59 | 19 | 1070 |
| 1700 | 2 | -- | 9 | 14.8 | 3.92 | 3 | 17 | 17 | 1048 |
| 1800 | 2 | 11 | 9 | 15.7 | 4.21 | 3 | 36 | 16 | 1029 |
| 1900 | 2 | 23 | 9 | 16.5 | 4.50 | 3 | 56 | 15 | 1011 |
| 2000 | 2 | 35 | 8 | 17.4 | 4.80 | 4 | 17 | 13 | 994 |
| 2100 | 2 | 48 | 8 | 18.3 | 5.10 | 4 | 38 | 12 | 979 |
| 2200 | 3 | 2 | 8 | 19.1 | 5.41 | 5 | -- | 11 | 964 |
| 2300 | 3 | 16 | 7 | 20.0 | 5.72 | 5 | 23 | 11 | 949 |
| 2400 | 3 | 30 | 7 | 20.9 | 6.04 | 5 | 47 | 10 | 935 |
| 2500 | 3 | 44 | 7 | 21.7 | 6.36 | 6 | 11 | 9 | 923 |
| 2600 | 3 | 58 | 7 | 22.6 | 6.69 | 6 | 37 | 9 | 912 |
| 2700 | 4 | 12 | 7 | 23.5 | 7.02 | 7 | 3 | 8 | 901 |
| 2800 | 4 | 27 | 7 | 24.4 | 7.35 | 7 | 30 | 8 | 891 |
| 2900 | 4 | 42 | 7 | 25.2 | 7.68 | 7 | 58 | 7 | 881 |
| 3000 | 4 | 58 | 6 | 26.1 | 8.01 | 8 | 27 | 7 | 871 |
| 3100 | 5 | 14 | 6 | 27.0 | 8.35 | 8 | 56 | 6 | 861 |
| 3200 | 5 | 30 | 6 | 27.8 | 8.69 | 9 | 26 | 6 | 851 |
| 3300 | 5 | 46 | 6 | 28.7 | 9.03 | 9 | 57 | 6 | 841 |
| 3400 | 6 | 3 | 6 | 29.6 | 9.37 | 10 | 29 | 5 | 832 |
| 3500 | 6 | 21 | 6 | 30.5 | 9.71 | 11 | 1 | 5 | 823 |
| 3600 | 6 | 39 | 6 | 31.3 | 10.06 | 11 | 34 | 5 | 814 |
| 3700 | 6 | 57 | 6 | 32.2 | 10.41 | 12 | 8 | 5 | 806 |
| 3800 | 7 | 15 | 5 | 33.1 | 10.77 | 12 | 43 | 4 | 798 |
| 3900 | 7 | 33 | 5 | 33.9 | 11.13 | 13 | 18 | 4 | 790 |
| 4000 | 7 | 52 | 5 | 34.8 | 11.50 | 13 | 54 | 4 | 782 |
| 4100 | 8 | 11 | 5 | 35.7 | 11.87 | 14 | 31 | 4 | 774 |
| 4200 | 8 | 30 | 5 | 36.5 | 12.25 | 15 | 9 | 4 | 766 |
| 4300 | 8 | 50 | 5 | 37.4 | 12.63 | 15 | 47 | 4 | 758 |
| 4400 | 9 | 10 | 5 | 38.3 | 13.02 | 16 | 26 | 3 | 750 |
| 4500 | 9 | 31 | 5 | 39.2 | 13.42 | 17 | 5 | 3 | 743 |