Colin Parkinson
Army.ca Myth
- Reaction score
- 12,418
- Points
- 1,160
Caseless ammo is so 19th century
The breech was closed by a bolt similar to those of more modern rifles to follow. Amongst the technical features of interest introduced in 1866 on the Chassepot rifle was the method of obturation of the bolt by a segmented rubber ring which expanded under gas pressure and thus sealed the breech when the shot was fired. This simple yet effective technology was successfully adapted to artillery in 1877 by Colonel de Bange, who invented grease-impregnated asbestos pads to seal the breech of his new cannons (the De Bange system).
Cartridge
The Chassepot used a paper cartridge, that many refer to as being 'combustible', whereas in reality it was quite the opposite. It held an 11mm (.43 inch) round-headed cylindro-conoidal lead bullet that was wax paper patched. An inverted standard percussion cap was at the rear of the paper cartridge and hidden inside. It was fired by the Chassepot's needle (a sharply pointed firing pin) upon pressing the trigger.
While the Chassepot's ballistic performance and firing rates were excellent for the time, burnt paper residues as well as black powder fouling accumulated in the chamber and bolt mechanism after continuous firing. Also, the bolt's rubber obturator eroded in action, although it was easily replaced in the field by infantrymen. The older Dreyse needle gun and its cartridge had been deliberately constructed in a way to minimize those problems but to the detriment of its ballistic properties.
http://en.wikipedia.org/wiki/Chassepot
The breech was closed by a bolt similar to those of more modern rifles to follow. Amongst the technical features of interest introduced in 1866 on the Chassepot rifle was the method of obturation of the bolt by a segmented rubber ring which expanded under gas pressure and thus sealed the breech when the shot was fired. This simple yet effective technology was successfully adapted to artillery in 1877 by Colonel de Bange, who invented grease-impregnated asbestos pads to seal the breech of his new cannons (the De Bange system).
Cartridge
The Chassepot used a paper cartridge, that many refer to as being 'combustible', whereas in reality it was quite the opposite. It held an 11mm (.43 inch) round-headed cylindro-conoidal lead bullet that was wax paper patched. An inverted standard percussion cap was at the rear of the paper cartridge and hidden inside. It was fired by the Chassepot's needle (a sharply pointed firing pin) upon pressing the trigger.
While the Chassepot's ballistic performance and firing rates were excellent for the time, burnt paper residues as well as black powder fouling accumulated in the chamber and bolt mechanism after continuous firing. Also, the bolt's rubber obturator eroded in action, although it was easily replaced in the field by infantrymen. The older Dreyse needle gun and its cartridge had been deliberately constructed in a way to minimize those problems but to the detriment of its ballistic properties.
http://en.wikipedia.org/wiki/Chassepot