Rotating gas-check

A rotating gas-check (more commonly known as an automatic gas-check) was a copper plate that automatically attached itself to a specially-designed studless projectile of rifled muzzle-loading ("RML") artillery, sealing the escape of gas between the projectile and the barrel and imparting axial rotation to the projectile.^[1]

Gallery

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1. RML 12.5in Studless Palliser Shell Mk I with Automatic Gas-Check
2. RML 12.5in Studless Common Shell Mk I with Automatic Gas-Check

See also

• Gas-checks in British RML heavy guns
• Attached gas-check