Abstract: An ammunition cartridge includes a tubular blank having a tail section in a shape of tail fins; a cap mated to a front section of the tubular blank; a solid core in a shape of a rod inside the tubular blank between the front and tail sections; and a casing having a propellant therein, the casing mated to the tubular blank. The core optionally includes an aerodynamic needle extending beyond the front portion. A portion of the aerodynamic needle inside the core is shaped as a spring. A muzzle wad and a washer are in contact with the muzzle wad and with the aerodynamic needle. The aerodynamic needle includes a portion embedded in the core that is shaped as a spring. The core includes a front portion and a rear portion, and a diameter of the front portion is larger than a diameter of the rear portion and is substantially equal to a diameter of the tubular blank. The cap can be conically shaped, round shaped, or can have a blunt front end, or can be shaped as two conical sections.