The Roto Grip Scream is in the HP-1 line. The scream is a high RG and low differential ball, just what I was looking for the drier lane conditions.
I drilled the Scream 4.75 x 4.5 x 2.75 pin up.
The Scream is very clean through the fronts, and strong arc on back. The scream doesn't have a skid /flip reaction, more of a hard rolly move off the spot.
I go to this ball when the heads dry up and I need some length..
For a entry level ball from RG the Scream is a great ball for the money.
Plus has great shelf appeal.

PAP 4 up 1 1/4

http://i532.photobucket.com/albums/e...124_211341.jpg