You can't mess with the Night Hawk core.

Drilling: 90 x 4.25 x 70
Pin position: Below bridge

I drilled the Nighthawk Stealth with a particular motion in mind, something that starts up early while maintaining a predictable, continuous downlane motion, and that's exactly what I got with this drilling. The out of box coverstock is strong enough to get the ball in a roll very early, but the ball never seems to lose energy down lane. I have been using this on the Kegel Route 66 pattern and it has been perfect as the first ball out of the bag. I do have a very heavy roll on the ball, so with the cover as aggressive as it is I do need some head oil for optimum performance, but when I am able to use this ball it is a game changer.

Brent Ritchie
900 Global Regional Staff

I've been trying to replace this ball as my go to ball but this thing just keeps on working on a wide variety of conditions. Carries all over the pocket. I can't say enough good things about this ball.
I know that AMF is kind of obscure and obsolete but the nighthawk line is a good match up for me.

+1 on AMF in general.  My AMF Sumo is still my favorite urethane ball.  That thing works decent on THS 25 years after release for me even with my low revs.  The gunsmoke cobra looks damn good is a great spare ball as well.

doom. i'd love to here your take on this ball.