- A = For Steel and Chilled Shot.
- B = For Common Shell.
- C = Saluting.
- D = Penetrating Power.
| Name, Nature, and Classification. | Powder Charge. | D | |||
|---|---|---|---|---|---|
| A | B | C | |||
| Lbs. | Lbs. | Lbs. | In. | ||
| Krupp’s pattern steel Breech-loaders. | |||||
| 30½ cm. | hooped | 158.4 | 158.4 | 16.4 | |
| 28 cm., | hooped and tubed | 132 | 132 | 14.4 | |
| 28 ” | hooped | 132 | 132 | 13.3 | |
| 26 ” | long hooped | 107.8 | 107.8 | 17.6 | 13 |
| 26 ” | short ” | 107.8 | 107.8 | 17.6 | 11.5 |
| 24 ” | long ” | 59.4 | 44 | 17.6 | 11.27 |
| 24 ” | short ” | 59.4 | 44 | 17.6 | 10.05 |
| 21 ” | long ” | 41.8 | 30.8 | 13.2 | 8.9 |
| 21 ” | short ” | 35.2 | 26.4 | 13.2 | 8.55 |
| 17 ” | long ” | 26.4 | 22 | 6.6 | 7.25 |
| 17 ” | short ” | 17.6 | 14.3 | 6.6 | 7.33 |
| 17 ” | short, light hooped | 16.5 | 16.5 | 6.6 | 7.88 |
| 15 ” | long hooped | 18.7 | 15.4 | 4.4 | 6.7 |
| 15 ” | short ” | 13.2 | 12.1 | 4.4 | 6.58 |
| 15 ” | tubed | 13.2 | 12.1 | 4.4 | 5.6 |
| 12 ” | hooped | 7.7 | 4.62 | 2.31 | 5.6 |
| 8 ” | heavy | 1.1 | 1.1 | ||
| 8 ” | light | 1.1 | 1.1 | ||
| 8 ” | .98 | 1.1 | |||
| 4 ” | .41 | ||||
- E = Chilled.
- F = Common.
| Name, Nature, and Classification. | Initial Velocity. | Working Effect. | |||
|---|---|---|---|---|---|
| E | F | E | F | ||
| Ft. | Ft. | Foot Tons. | Foot Tons. | ||
| Krupp’s pattern steel Breech-loaders. | |||||
| 30½ cm. | hooped | 1,591 | 1,623 | 12,584 | 11,176 |
| 28 cm., | hooped and tubed | 1,515 | 1,640 | 8,960 | 8,931 |
| 28 ” | hooped | 1,515 | 1,640 | 7,210 | 8,931 |
| 26 ” | long hooped | 1,587 | 1,640 | 6,802 | 6,876 |
| 26 ” | short ” | 1,430 | 1,387 | 4,835 | 6,466 |
| 24 ” | long ” | 1,502 | 1,391 | 4,625 | 3,511 |
| 24 ” | short ” | 1,469 | 1,355 | 4,625 | 3,327 |
| 21 ” | long ” | 1,476 | 1,394 | 3,275 | 2,348 |
| 21 ” | short ” | 1,312 | 1,394 | 2,587 | 1,970 |
| 17 ” | long ” | 1,548 | 1,525 | 1,944 | 1,809 |
| 17 ” | short ” | 1,279 | 1,279 | 1,399 | 1,127 |
| 17 ” | short, light hooped | 1,325 | 1,341 | 1,437 | 1,411 |
| 15 ” | long hooped | 1,623 | 1,615 | 1,431 | 1,172 |
| 15 ” | short ” | 1,477 | 1,591 | 1,030 | 1,072 |
| 15 ” | tubed | 1,358 | 1,446 | 1,001 | 888 |
| 12 ” | hooped | 1,476 | 1,230 | 584 | 345 |
| 8 ” | heavy | 1,118 | 84 | ||
| 8 ” | light | 1,118 | 84 | ||
| 8 ” | 1,135 | 66.5 | |||
| 4 ” | 1,837 | ||||
GUNS.
Smooth-bore guns are now entirely obsolete. The rifled ordnance is constructed entirely on the Krupp system of steel breech-loaders. Although the Krupp system taken as a whole is represented by three distinct types of guns corresponding to different developments of the breech-closing mechanism, but one, the latest development, appears in the armament of war vessels. There are also two types corresponding to the building of the body of the guns, but these are quite similar, the difference being simply in the use of a number of thin hoops in the later guns to replace a few thick hoops in the earlier construction. All guns except the 9-pdr. bronze breech-loader are built entirely of steel. The broadside-guns of medium calibre are divided into two classes, the long and the short gun, the latter being intended for vessels whose beam or displacement will not permit the use of the longer and heavier gun. The short gun of one calibre is, however, in all cases a more powerful gun than the long one of the next lower calibre.
All naval guns except the converted 15-cm. calibre have a steel body strengthened by hoops. The converted gun has no hoops, it having been strengthened by boring the body up to form a casing, which was shrank over a steel tube. This tube extends from the breech-block to about one calibre beyond the muzzle.