[quote=RealdoggeSyndicate]The size of the head has nothing to do with the hardness of the bite,coralation of bite has to due with symmetrical skull and jaw confiquration.length of muzzle creates harder bite due to sissor bite and leverage in bite design.I.E. an overly long snout with a small head or an overly large head with a short muzzle does not insure a greater bite. just as people beleive that pit bulls have a locking jaw not the case,its hardness of bite thats all.................thats why there is bloodlines with in.. Realdogs[/quote] YEs I agree. Just 10% of the APBT have good bite and just 30% of the 10% are Hard Bite. Hard Bite means the dog like to bite hard , has all the muscle and the veins, heart to use in combine to bite Hard.Need gammeness, staminna too.Desire to bite hard is a point that most of people do not understand... The even/pincer bite, is important so as the broad arc zigmatic and the muscles from the jaw. The best bite could be from APBT x Mastiff probably that combine most of these qualities. In the video the weight of the dog and the power to jump will be influence the test...the stoping power will be diferent.