Hi there.  For the past 5 years or so I have been drilling for myself and my customers (I own a small pro shop) primarily Storm and Roto Grip equipment - with the occational Columbia ball thrown in for the lower end stuff.  

I just ordered an original Hammer Black Widow for my 14 year old son.  He is a high track / higher speed bowler with lower revs (maybe in the 200 range).  From what I've seen from other bowlers this ball does exactly what my son needs - it revs. up early yet continues it's move all the way through the pins.

I was thinking for him I would drill this ball 4 1/2 x 3 with pin under.  Does that make sense to you Hammer guys?  The distributor will deliver the ball this afternoon so I really only have about 6 hours - sorry for the last minute but I am hoping to get some input today.

Thanks

OK, so after reading your responses, a couple of individual messages, and looking at the drill sheet (the same as every other asym. drill sheet) I decided to drill the ball 4x3.  The pin ends up just right of the ring finger - needed a medium-size balance hole on PAP.  

We didn't get a chance to throw it today.  I will update the thread either tomorrow or Thursday after he throws it.

Thanks for the input everyone.