This ball was suggested to me by my boss at the Strike Connection. He usually picks good ones, and this one is no exception.
My 15 lb. RIP (pin out 3 inches, 3.25 oz. top) is drilled 5 x 4 1/2. Pin just above ring finger, cg 3/4 inches right of grip center, mass bias just right of thumb in strong position. Simply a weak leverage drill.
I've tested the RIP on several conditions, but mostly on a normal 7 to 7 house shot with semi-clean backends. This condition is where Columbia's "high performance 2nd shift ball" is in its prime, in my opinion. This ball clears the heads easier than any ball I've ever thrown, and makes a strong, but not unpredictable move on the end of the lane. The pin carry is also very good. The entry angle produced just throws pins around.
Plus, after the heads break down, you can move in and still use it, because it recovers so well. In a tournament in Des Moines, I used it for 8 games straight, with an 8 board total move.
A must have for tournament bowlers, but may be a little over-priced for the everyday league bowler. Also, in my opinion, overpriced for the combination of coverstock and core. Nothing in this ball makes it worth $250. You can get nearly the same ball in a Messenger Ti Pearl.
However, strong marks in performance. 9 out of 10. Loses one point because it is NOT an oil ball. But, covers all conditions short of wading pools. Highly recommended (just ask Ricky Ward).
Good luck y'all.