I don't follow the spins people discuss on this board or know what flipping your hand over causes in a FB. I was just watching bullet spin a few hours ago, and I stand by it being a mistake no matter how you get it. That pitcher will not be a pitcher on my team, when the one next to her is pitching proper spins.
Find me one in the world (65 mph and bullet), find me one that is HS age, find me one that actually throws FBs (they will be throwing movement), etc. However, a bullet spin FB is a perfectly straight pitch, and I do like the spinners over the Fastballers with a straight path to their pitch.
If you "don't know", how can you make such statements? Just a little confusing to me.