Billy, you say that the pin is over the fingers, is it directly over the bridge..? Does the ball have any side weight..? Where are you throwing the ball, over which arrow out to where down the lane..?
Depending on how the ball is drilled, it could be rolling out on dry lanes/dry heads and tighter backends. Especially if you stay behind the ball and have a lot of forward roll. Have you tried it on an oilier condition..? =:^D