Breach loading

Cannons powered by pneumatic pressure (compressed gas) using a valve or other release.
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spanerman
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Ok im planning on buying a new 22mm barrel for my gun and having a breach loading system. Here are my plans but i have a problem with point X how do i seal it to stop all the air just going around the barrel?
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Sam
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iknowmy3tables
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an o-ring or another hollowed brushing
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spanerman
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Specialist 4
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sorted,
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ok ime planning on putting a 22mm-22mm straight comector in there where the pipes meet il have a rubber tap washer to seal :twisted: what you think of the design/diagrams?
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iknowmy3tables
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okay do 22mm couplings fit in 28mm pipe
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