.24 Dardick Tround Tri-Bore United States
Details
| Type | Ball |
|---|---|
| Projectile | Spitzer, ceramic, white |
| Case | plastic, black |
| Primer | percussion, rounded, copper, battery cup crimp |
| Headstamp | [none] |
| Notes | This was intended for hard rock drilling. A device at the drill head would fire these cartridges, and the ceramic projectiles would break up the rock. The ceramic projectiles would also shatter, whereas stell projectiles would not and would thus damage the drill bit. Copper primer holder. |