3.2-INCH B. L. RIFLE, MODEL 1885 (MODIFIED). ([Fig. 38.])
| Material | steel |
| Total length | 7.56 feet |
| Calibre | 3.2 inches |
| Weight | 829 pounds |
| Grooves | 24 |
| Twist of rifling, uniform | 1 turn in 30 calibres |
| Axis of trunnions above ground | 3.56 feet |
| Powder-chamber | ellipsoidal |
| Vent | radial |
| Preponderance | 50 pounds |
| Muzzle velocity | 1685 ft.-sec. |
| Maximum range for shrapnel[4] | 6613 yards |
This gun consists of a tube (a), jacket (b), trunnion-ring (c), sleeve (d), key-ring (e), locking-ring (f), base-ring (g), and breech mechanism, De Bange obturator, vent-bushing of copper.
3.2-INCH B. L. RIFLE, MODEL '90. ([Fig. 39.])
This gun consists of tube (g), jacket (h), and breech mechanism, De Bange obturator, vent-bushing of copper.
The jacket, trunnion-ring, base-ring, and sleeve, of the model of 1885, form one piece, and the key-ring is omitted, as the tube and jacket are locked firmly together by shoulders (a, b, c) in rear and shoulders in front, with a projection on the tube that fits into a corresponding recess in the jacket.
d is the powder-chamber, f the slope from no lands to maximum lands, and e the connecting slope for seat of rotary band.
The vent-cover is a pin working in a slot in the face of the carrier-ring. (See [Fig. 36.])