chun914
If your main concern is the callous on your thumb, the pitch lateral right will cause it for right handers. I went through thumb pitch changes recently and had zero and 3/8 right. I needed to change because I was spinning the ball too much with this set up and longer oil patterns was killing me. I tried zero and zero and this made my hand feel a bit cramped up in a way. I am at 3/16 forward and 3/16 right to take care of the squeezing. The 1/2 forward pitch you have is a quite a bit (IMO). I would recommend having a good pro shop check your span and finger pitches if you change from forward back toward zero. A lot of bowlers get in trouble when they start changing thumb pitches. With your present set up you might be limited with the number of hand releases you can have.
jodyk24
Edited on 2/27/2009 5:35 PM