Back in 1982, testing showed that most JHP (Jacked Hollow Point) ammunition would plug up with clothing and fail to expand in soft tissue. The typical JHP was passing through like hardball ammo causing little damage. For this reason, the original CORBON JHP 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 JHP a one-shot stopping power percentage of over 90%! The rapid expansion reduces projectile over-penetration.