Gas Check

Posted in: Shooters Glossary

A gas check is a disc at the base of the projectile (usually made from ductile metal like copper, zinc, or aluminum, and alloys such as brass have been used), or bullet, that helps to keep all the pressure and gasses from the propellent igniting behind the bullet. Of course, the shooter does not want any gases leaking around the projectile while it travels down the barrel, as this causes an imbalance in the bullet. A gas check is usually only necessary on very high-pressure rounds that have a soft-lead projectile.

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