With the 15-inch guns at close quarters against iron-clads, 60 lbs. and a solid shot may be used for 20 rounds. So also with the 11-inch, 30 lbs. and a solid shot. With all the other guns, under like circumstances, and where penetration is desired, the distant firing charges should be substituted for the near firing.
Of the service charges, one-tenth shall be for distant firing, six-tenths for ordinary firing, three-tenths for near firing, or for two projectiles. Saluting charges to be of under-proof powder.
The calibre and class of guns for which the cartridges are intended must be distinctly marked near the top of the lid end of the tanks.
Table of Charges for Navy Rifle Guns.
| Gun. | Ordnance. | Charge of Powder. | ||||
| Calibre. | Diameter of Bore. | Weight. | Weight. | Kind. | Diameter of Cartridge-Gauge. | |
| Pounder. | Inches. | Lbs. | Lbs. | Inches. | ||
| Parrott | 100 | 6.40 | 9,700 | 8. | Rifle. | 5.50 |
| Do. | 60 | 5.30 | 5,400 | 6. | Rifle. | 4.60 |
| Do. | 30 | 4.20 | 3,550 | 3.25 | Cannon. | 3.70 |
| Do. | 20 | 3.67 | 1,750 | 2. | Cannon. | 3.25 |
| Dahlgren | 20 | 4.00 | 1,340 | 2. | Cannon. | |
| Do. | 12 | 3.40 | 880 | 1. | Cannon. | |
Powder-Tanks.
| Capacity of Tank for Powder in Grain. | Exterior Dimensions. | Weight, when empty. | Approximate Weight, when filled with Cylinders. | |
| Height in inches including Lid and Handle. | Sides in inches. | |||
| 200 pounds | 22 1/4 | 16 1/2 × 16 1/2 | 67 1/2 pounds. | 218 Pounds. |
| 150 pounds | 22 1/8 | 15 × 15 | 59 1/2 pounds. | 170 to 180 lbs. |
| 100 pounds | 20 1/2 | 13 × 13 | ||
| 50 pounds | 16 3/4 | 10 1/4 × 10 1/4 | ||