The HP68 (copper / nylon composite) 68 caliber shaped projectile carries the same muzzle energy as other glass breaking projectiles at DOUBLE the range.
The HP68 is bore matched to 0.686" barrels. This allows you to take advantage of every last bit of power your launcher has to offer.
Designed to be fired from a rifled barrel, the HP68 is spin stabilized, making it 25 X more accurate than spherical projectiles. At 7.8 grams, and with a solid core, the HP68 is more aerodynamically stable than all other 68 caliber projectiles.
The more distance between you and the target, the safer you are.
The heavier 7.8 gram HP68 retains muzzle energy and accurcay over a longer range. Fired at 300 FPS, after 60 feet it still has enough energy to break tempered auto glass, sliding glass doors, and third story bedroom windows. (15 Ft-Lbs | 20 Joules)
That's more energy than all other 68 caliber projectiles. Double glass breaker balls and nylon / PVC.