I am not new to bowling but up until now I have only used lane balls.  Since I recently joined a bowling club for college I would like to get my own ball.  I don't have many revs yet and I throw the ball "slice" or "screw-ball" or whatever you may call it.  My average with the house balls(many different) is around 140.  I just want to get some feedback on what type of ball you all think I should use.

It seems you have made up your mind on the ball you want. Why ask? THere have been many balls mentioned for someone just learning to throw a hook by some very knowledgable bowlers. Either take their advice or get what you wanna get.
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You can always hit em hard when you've got the balls

Lefties are the only people in their right minds.

no1bucsfan

If you are going to spend the money on good equipment, you really should invest the time and effort to change your release so that you can throw a hook rather than the "slice" shot that you are throwing now. Do that and you will find that your ball will have more movement, and your shot will be more powerful and you should begin to strike more often. Another thing to consider, are you using balls with a conventional grip, or a fingertip grip ?.......Anyway, work on that release and then it will be easier to judge how aggressive of a ball would be best for you.
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What's a spare ?