The Roto Grip Halo Pearl is Roto Grips newest HP4 line release.  The Halo Pearl Contains the Centrum Core which is very popular and is also found in the original Halo.  The Halo Pearl is covered with the new eTrax-P18 pearl Reactive which is also found on the Idol Pearl.  Finally the ball is factory finished at 1500 grit polished.
I drilled my Halo Pearl with the same layout as my original Halo.  The pin is over my ring finger with the CG straight below my pin.  This gives me a real high flare ball reaction.  The Pearl is very strong down lane compared to the smoother rolling Halo Solid.  I have found most of my success with the Halo Pearl on medium length patterns where there is plenty of dry in the back end part of the lane.  The Halo Pearl also reacted pretty well on a longer pattern with a lower amount of oil volume as well.  For me the Halo Pearl did not react very well to lane carry down which made it kind of over under and real inconsistent off the break point.  But on wood lanes where oil just gets moved or removed and I get clean back ends the Halo is an awesome powerfully hitting bowling ball.  It’s a great compliment to the original Halo.