I beleive the m.b. is 6-3/4" right of the hart.the hart marking is an intermediate m.b. so you can drill the ball strong without the need of a wt.hole,that is the int.m.b. will offset the excess side wt.of a strong drilling to a point.that's how it was explained to me.
I love mine and wish it would work for me on a lighter shot with carrydown but it won't so I only get to use it in one of the two centers I bowl in.I hope Hammer comes out with a pearl particle with this core in it but I doubt it,maybe a longer pin to pap distance would help get the ball down the lane with some pop would work?I feel that's the reason why so many peps had problems with this ball not hooking for them,the ball was probably just burning up in the heads and roll'n flat into the pins.that's basicly the reaction I get in my other house I bowl in.
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"one should not increase,beyond what is necessary,the number of entities required to explain anything"