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Temporary cavity

The transient radial tissue displacement produced by a bullet's passing. Caused by the transfer of kinetic energy to surrounding tissue via compression and shear. Significant at rifle velocities above approximately 750 m/s (Sellier-Kneubuehl threshold); largely irrelevant at typical handgun velocities.

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Related terms

Permanent cavityAbrasion collarAccidental dischargeBallistic coefficient (BC)Blow-out exit woundChoke (shotgun)DeflagrationExternal ballisticsFBI 10% gelatin protocolGrease ringHydrostatic shockInternal ballistics

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