Attached gas-check
An attached gas-check was a copper plate that was physically attached to the base of a studded projectile of rifled muzzle-loading ("RML") artillery, sealing the escape of gas between the projectile and the barrel.
Gallery
    
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- RML 12.5in Studded Palliser Shell Mk III with Attached Gas-Check Mk II
 - RML 12.5in Studded Common Shell Mk I with Attached Gas-Check Mk II
 - RML 12.5in Studded Shrapnel Shell Mk I with Attached Gas-check Mk II
 
References
    
- Secretary of State for War (1887). Treatise on Ammunition Fourth Edition (Revised) Corrected to October 1887. London: Her Majesty's Stationery Office. Chapter XII
 
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