Designed to be fired from a rifled barrel, the HP68 is spin stabilized, making it 25 X more accurate than spherical projectiles. The rifling digs in and spins it up to 12K RPM!
The back half has a thick sidewall, which acts like a gyroscope, stabilizing the projectile’s attitude.
At 7.8 grams, and with a solid core, the HP68 is more aerodynamically stable than all other 68 caliber projectiles.