I haven't thrown this ball personally, however, being a pro shop operator, I would hope that I have the knowledge and sense to review this ball even without throwing the ball myself.
Bowler Specs: 18-20 revs, 17-19 MPH, 5 degree axis tilt, 60 degree axis rotation.
Ball Specs: 4 3/4" pin to PAP, 3 5/8" CG to PAP, pin just above PAP/ring finger line, mass bias on VAL, balance hole 3/4" above PAP (25/32" diameter, 3" deep).
Lane Condition: Moderate taper with 10 units on board one, increasing to 15 units on board 11 and 18 units on board 12 increasing to 26 units on board 20. Oil is applied to 26 feet, buff runs until 26 feet. The backends are freshly stripped.
This ball for this bowler was REAL strong. He had to pitch the ball (with decent speed - 18 MPH)out to at least the 3 board to keep it in the pocket (he chucked it to the ditch, came off the one board and still came in a tad high on one ball thrown at around 17 MPH).
The ball had a real predictable backend (very flippy with little arcing), due to the placement of the cg and mass bias in relation to the VAL. On the shots with fresher backends (1st game), the ball made a sharp move coming off the buff. On the shots with more carrydown and a bit of midlane scorching (3rd game), the ball still moved strong and didn't lack any power.
He used the ball all night long without moving at all, just made speed adjustments. As the night wore on and the carrydown began to increase, the ball became even better as he didn't have to push the ball out so hard. It still had its flip and strong backend, but the could open up the lane more. As he put it to me, "I've got at least 6 boards to shoot at."
This bowler mainly uses a hooking ball and really bends the hell out of any ball, so for those of you who like a big hook with a strong backend, this ball may be of use to you.
I could see this ball drilled more leverage/stacked at this pin position and being used on carrydown situations with a good deal of oil in the heads and midlanes. However, the strength of the ball, from what I witnessed, would be too much for lighter patterns if drilled near leverage unless you are lacking in the hand department.
I really like this ball and was impressed at the predictability and strength of the reaction with this drilling. I wouldn't hesitate to either pick one up myself or sell this to another customer who desires a good hooking ball.