Dakota Ammo ASD4520020: Back in 1982, testing showed that most Jacketed Hollow Point (Jacked Hollow Point) ammunition would plug up with clothing and fail to expand in soft tissue. The typical Jacketed Hollow Point was passing through like hardball ammo causing little damage. For this reason, the original Corbon Jacketed Hollow Point was designed with higher velocity than competitors. Independent studies have shown that the rapid energy transfer from the bullets violent and immediate expansion in ballistic gelatin has given Cor-Bon Jacketed Hollow Point a one-shot stopping power percentage of over 90%! The rapid expansion reduces projectile over-penetration.