"For the perfect strike, we use a 16-pound ball that we realease from a height of 9 - 1/2 feet to generate a ball speed of 17 mph, because that is a typical ball speed of a "good" 190 average bowler," Stremmel said. "The ramp is set so the ball hits the pocket 2 - 1/2 inches off the center of the head pin."

Your obviously your going to get differnt kind of carry and pin action at all the different kinds of entry angles. One or two degrees may not seem like much, but the difference between five or six degrees is very huge.

As you start to back off, lets say around four degrees, your going to start leaving backrow pins(mainly 7 or 10). At seven degrees, a right hander starts to leave the nine pin.

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