There's no one way to answer this question, too many variations that factor into this equation; but remember (outside of the stars, layout, pin to pap etc)  alot is based on what conditions you bowl on. If you throw any ball on the wrong condition, it's going to either roll too early and roll out (meaning not entering the 3 phases properly)  and roll like a turd, or it will push too far down lane before reacting (over/under).

It's always important to understand what you have, how it's layed out, what surface your equipment is at, what you bowl on that will determine proper ball reaction on what you face to MATCH UP on what you bowl on.

Hope this gives you a better understanding.