then maybe its too heavy for you?
get a lighter one and get more control first.
weight for me, just affects my fingers because i need to cling
onto the ball during the swing and release when needed
if the ball is too heavy, my fingers will get ache (from the
weight of the ball, but usually incorrect sizing)
that is why people get their own balls, the holes will be
drilled to match your own hand and finger size.
usually use a 9 .. but sometimes have to use 8 if there are no 9
balls.. but at times 8, cannot really put my fingers in then its
uncomfy..
Don't want to get my own ball coz i don't bowl often mah..