Ball coming off hand early while throwing backup ball

[ursus]

I wanted to try working on throwing a backup ball when I had right side leaves today. Each time I tried it the ball would leave my hand way early (back at my heal or further back) and bounce. This only occurs when I threw the backup ball. I have an oval thumb hole that is angled to the right, I am wondering how much that has to do with it. Is there anyway of overcoming this?

On the good side, I was getting a few boards of left to right hook.

[jimlc2001]

Are you muscling your regular throw? It might be that your hand doesn't provide as much pressure throwing the backup style. Try using using some tape in the thumb hole or on your thumb. Or you invest in a plastic spare ball.

[billf]

Don't screw up your regular shot just to learn/practice a back up ball.

[ursus]

I was trying what Joe Slowinski suggested as a means to keep your elbow in and forearm facing forward, he suggested that by practicing the backup ball it would help your regular shots. Here is a link to the article:

http://bowlingknowledge.info/images/stories/slowinski_march_article_09.pdf

Just wondered why it only happened when I keep my hand inside. My thumb hole is fairly tight, not so much that I have suction unless my thumb swells in the heat but I can't put a single piece of tape in or it becomes so tight I can barely squeeze my thumb in and it wont come out.

[Tampabaybob]

interesting scenario, but I agree with Bill. Get a cheap white dot and use that for your right handed spares. I gave away my spare ball a couple of years ago, then kicked myself for doing it. Found a used Roto Grip world ball in the pro shop, paid 20 bucks for it and only use it for 6 and 10 pin shots. By throwing a back-up ball, I would worry that someday if you're in a pressure situation and have to throw the ball correctly, that back-up hand position might slip in at the wrong time and cost you a team point or worse yet, some money in a tournament.

Just my thoughts.
Bob