Maybe just maybe you're sparring partner has a glass jaw
That machine is very irreverent when it comes down to real punching power, it is useless
if it hurts your sparring partners when you hit them, why are you worrying about such a silly thing? that punching power machine isn't accurate anyway
when you fight you use more aggression...you have a moving target that may move towards you enhancing the power...angles and paths also important...as well as mind power.....with the machine however you are more or less stationary.
is this real ? or fake it only showed 500 force power ? but when i spar whit some one it really hurts them i dont get it