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A system for firing multiple projectiles in a parallel or diverging manner is provided. The system can comprise tail-end portions of projectiles that add structure to a cartridge, provide for efficient combustion, allow projectiles to transition from a straight configuration in the cartridge to a sp

A system for firing multiple projectiles in a parallel or diverging manner is provided. The system can comprise tail-end portions of projectiles that add structure to a cartridge, provide for efficient combustion, allow projectiles to transition from a straight configuration in the cartridge to a splayed configuration in a chamber, and ensure complete evacuation of the chamber. The system can include a tail-end portion of a particular projectile with openings that distribute energy from combustion of an ignition charge, facilitating firing of multiple projectiles. A tail-end portion of a projectile can include a ball joint upon which the body portion of the projectile moves causing an angle between the body portion and the tail-end portion. A space can exist in the body portion adjacent to the ball joint to allow off-center shifting of the body portion with respect to the ball joint.

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1. A projectile comprising: a body portion comprising a penetrating nose portion; anda tail-end portion connected to the body portion, the tail-end portion having a smaller cross-sectional area than a cross-sectional area of the body portion, and the tail-end portion comprising openings that distrib

1. A projectile comprising: a body portion comprising a penetrating nose portion; anda tail-end portion connected to the body portion, the tail-end portion having a smaller cross-sectional area than a cross-sectional area of the body portion, and the tail-end portion comprising openings that distribute energy passing through the tail-end portion from combustion of an ignition charge,wherein the tail-end portion comprises a ball joint upon which the body portion translates and pivots causing an angle between the body portion and the tail-end portion. 2. The projectile of claim 1, wherein the ignition charge is located within the tail-end portion. 3. The projectile of claim 1, wherein the body portion includes explosive material configured to detonate after impact of the body portion with an object subsequent to combustion of the ignition charge. 4. The projectile of claim 1, wherein the tail-end portion comprises a columnar shape. 5. The projectile of claim 1, further comprising a space in the body portion adjacent to the ball joint into which the ball joint becomes located when the body portion translates upon the ball joint. 6. The projectile of claim 5, wherein the body portion is centered on the ball joint when there is no angle between the body portion and the tail-end portion, andwherein, when the ball joint is in the space, the body portion is off-center with respect to the ball joint. 7. A projectile comprising: a body portion comprising a penetrating nose portion;a tail-end portion connected to the body portion, the tail-end portion having a smaller cross-sectional area than a cross-sectional area of the body portion, and the tail-end portion comprising openings that distribute energy passing through the tail-end portion from combustion of an ignition charge, the ignition charge located within the tail-end portion,wherein the tail-end portion comprises a ball joint upon which the body portion translates and pivots, causing an angle between the body portion and the tail-end portion. 8. The projectile of claim 7, further comprising a space in the body portion adjacent the ball joint into which the ball joint becomes located when the body portion translates upon the ball joint. 9. The projectile of claim 8, wherein the body portion is centered on the ball joint when there is no angle between the body portion and the tail-end portion, andwherein, when the ball joint is in the space, the body portion is off-center with respect to the ball joint. 10. The projectile of claim 7, wherein the body portion includes explosive material configured to detonate upon impact of the body portion with an object subsequent to combustion of the ignition charge. 11. The projectile of claim 7, wherein the tail-end portion comprises a columnar shape. 12. The projectile of claim 7, wherein a length of the projectile mostly is comprised of the body portion. 13. The projectile of claim 7, wherein the tail-end portion is located behind the body portion at a rear-most end of the projectile with respect to a forward direction in which the projectile is configured to travel. 14. The projectile of claim 12, wherein the tail-end portion is located behind the body portion at a rear-most end of the projectile with respect to a forward direction in which the projectile is configured to travel, such that a length of a portion of the projectile in the forward direction that translates and pivots upon the ball joint comprises most of the length of the projectile.