Couple good "Box O Truth" offerings for your viewing pleasure:

http://www.theboxotruth.com/docs/edu59.htm

http://www.theboxotruth.com/docs/bot29.htm

Not much fanfair over the 7.62x25 being the only pistol round tried that penetrated the kevlar nato-spec helmut... but it shows that the round does penetrate better than most any other standard pistol round. It is purported to penetrate even classIII body armour as well - don't know if that's fact.