I have to agree with chinamigarden and crabby_Bob. I have seen softballs with different covers (i.e. leather vs. vinyl) fly very differently. We used to run a manual pitching machine (Louisville - Blue Flame) in 10U and I would get close to 1 foot of drop at the plate from 35 feet just by using a leather ball versus a vinyl covered one. Also a new ball introduced would have similar behavior until it got scuffed up adding to the drag.