The 30.5 cm Ring Kanone L/22 was a 30.5 cm 22 caliber long Krupp Ring Kanone. It was a rifled breech loader built-up gun with a Krupp cylindroprismatic horizontal sliding breech. The gun became famous
30.5 cm RK L/22 in 1873
The 30.5 cm RK L/22 as showpiece on the Vienna fair
A driving band or rotating band is a band of soft metal near the base of an artillery shell, often made of gilding metal, copper, or lead. When the shell is fired, the pressure of the propellant swage
30.5 cm RK L/22
…The deep grooves were a feature of the old rifling system that would be abandoned by Germany. The Vienna gun still had the old projectiles with lead driving bands. The projectiles were 760 mm long. The steel grenade with 7 kg of explosives weighed 296 kg. The hardened grenade weighed 303 kg and contained 3.3 kg…
Russian 122 mm shrapnel shell, which has been fired, showing rifling marks on the copper driving band around its base and the steel bourrelet nearer the front
Modern 155 mm artillery ammunition – these shells are unusual in having two driving bands. The shell on the right is a modified M107.