Drilled mine 4 1/2 x 5 pin slightly above ring and to the right with the cg in the palm. I bowl on a simple 10 to 10 and about 38 feet long. Box finish on these clean back was a little to much was really a monster hook ball. Yet as quick as the ball changed directions down the lane it was still very controllable. I just recently polished mine up and it dramatically changed the reaction. It allowed me to square up and play a little more up the boards. Overall a very good ball with the versitilaty of the cover and the strength of the core it has a lot of bang for the buck.

Columbia Flipside-Shock:
Ball Specs

The ball being drilled was a 2” pin out with 3.00 oz top weight.

The drilling chosen was my favorite. Pin 3 3/4" from PAP and Mb 4 1/2" from PAP ( approximately 60 degrees) pin is below fingers, 1 3/4" above grip midline. Weight hole past axis pitched away at a 3 o'clock angle.

Bowler Information:
Track diameter is 10 1/2.
PAP is measured at 5 1/4 over and 3/8" up.
Average ball speed (foul line to head pin) is 17 mph.
Axis rotation is typically 45 degrees
Initial rev rate is typically 300 rpm, "Tweener"

Thanks to Danny Speranza from Columbia for allowing me to test this ball.
REVIEW:
I bowled a summer league at AMF Waukesha which mixed up the oil patterns in 4 week segments, the last 4 weeks we ran into heavy oil and carry down. I felt I needed a new ball to help me with this condition, heavy oil and carrydown and my game do not mix. Danny suggest the Flipside "Shock". Now that I have had the ball for about 1 month, I have 4 nights on the ball and have 3 700's to my credit. Just a great ball. As long as you clean backends, the ball is awesome. Clean and smooth through the fronts, a impressive mid lane roll, it revs up quick with a strong but smooth backend reaction. The only condition the ball is just to weak is the flood with carry down. It can get to the pocket, but will leave week 9 counts. It will handle heavy oil conditions, but you need clean backends, then the ball matches up well. I love the way this ball revs up in the mid lane and the strong change of direction on the backends. Because the ball rolls so well, the carry is awesome. I personally feel that this ball will be ball of the year for sales in the mid-price level. $150-$170. It's that good.

Compared to my other Balls:
Ultimate Inferno: The Shock revs up quicker and is harder on the backends with a touch more over all hook.

Compared to My Track Phenom Unleashed:
Cannot tell any difference except for the additional $50 savings. A touch smoother on the backends than the Phenom Unleashed.

Compared to Track Mutant:
The Shock has more overall hook and revs quicker. About the same backend reaction.

I used the Shock on wood lane centers and have not yet used it on a panel lane surface. Both houses on wood the ball performed wonderfully. Thanks to Columbia and Danny Speranza for the suggestion.

Thanks for reading me review.
Dwight

Drill Pattern:
5X3
55 degrees
Pin Above Fingers


This ball has a tendacy to play very early.  When the ball was left dull we could actaully get the ball to stop and hook out.  Once this ball was polished it became a little skiddish.  Either way the straighter we played this ball the better the reaction.  After drilling these for a few different people, the bowlers with a lower rev rate or with a lower track seem to benefit more from the Shock.  We are going to test another one of these with a different pattern to see if it can be played better from inside angles.  Since this is a mid-price ball, it is definitly worth the money, if you want something to read the front part of the lane.

This is a great ball, it's a nice compliment to my X factor Ace. It to hits like a ton of bricks. It only lasted me about 600 games and 2 resurfaces so it lasted all right.(BETTER THAN ANY BRUNSWICK BALL). i picked that ball again about 3 weeks ago, and man can it hit better than ever. I let it sit for about 4 months then one day took it out and bang shot a 289 right of the start and man does it feel better than having an old friend back.
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William Esau
Lafayette, IN