| 摘要 |
An ammunition cartridge for producing subsonic flight of a projectile therefrom at substantially all angles of fire relative to the horizontal, including an elongated, generally cylindrical case including a closed end containing a primer therein, a body portion suitable for the receipt of a quantity of gunpowder therein, and an open end suitable for receiving an elongated projectile therein. The case further includes a first stepped down stage at the open end thereof wherein the outer diameter of thereof is reduced by an amount sufficient to encircle at least a portion of the length dimension of the elongated projectile to thereby temporarily retain the projectile disposed in the open end of said case means prior to the firing of said cartridge, and at least one further stepped down stage disposed contiguous to said first stepped down stage and extending from said first stepped down stage in the direction of the closed end of said case means, the reduced diameter of said second stepped down stage being greater than the diameter of said first stepped down stage.
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