Ok guys I'm really trying to learn about bowling balls in general.  Like the pap and the mass bias, and why the ball act differently when drilled like this and like that.  And for the life of me I cant understand it.  Like i through a total nv thats polished then sanded to 1000 on the track great ball love it pap in above and to the right of the ring finger. Then I have a anger oob finish pap right under the middle finger does nothing goes straight no hook no nothing.  Im really serious about bowling come close to 300 games and alwyas looking for advice on which balls to add to the arsneal.  So any help would appreciated.  I would like to know what balls to add I have an total nv and a fury but seems like im missing something

The PAP, or positive axis point- point on the surface of the ball that is at the end of the bowler's axis of rotation upon delivery.

Basically what this means is that it is a tool for us Pro Shop Professionals to help fit equipment into your game- more customized for you.  The way you throw the ball (hand position at release) determines where the PAP is located.

The Mass Bias is the Preferred Spin Axis for asymmetrical cores.  The PSA (or mass bias) in a bowling ball occurs when the weight block or portion of weight block is more dominant in one direction inside of a bowling ball, this PSA is the axis which a ball desires to rotate around, and which it flares to achieve this rotation.
Again this is another marker to help set the bowling balls dynamics into your friend.

In order to have a good recommendation it is important to head to your local Pro Shop Professional to have him/her watch you bowl, identify your PAP, and he/she can look at your current arsenal and fill in the gaps for you.

Hope this helps.
--------------------
James McCarter
Co-Owner/Operator
The Bowlers Solution INC
Roto-Grip Staff Member

Thats good to know and one other thing i hear people talking about when they buy a new ball they want I think like 1-2 pin or something like that whats that mean?

The pin a colored dot on two piece balls that generally indicates the top of the core.

When you are talking a 3 inch pin that is the distance from the CG (Center of gravity) on the ball to the colored pin. The CG is generally mark with some sort of a punch mark at the factory. A proshop should always weigh the ball before drilling to ensure that the ball has been marked correctly.

Asymmetrical balls also have a mass bias point marked on the ball. Asymmetrical balls have cores that are not consistent in size and shape, lumpy maybe a better word.

Each bowler has a PAP (positive axis point) determined by their release and is a point about which the ball rotates immediately after release. This is referred to in a measurement of like 5 ¼ inch over and 3/8 inch up from the grip center.

Proshops can use this PAP to determine where the Pin, CG, and mass bias point should be placed to achieve a desired reaction.

You will hear numbers of 5 inch pin and 3 in CG meaning the pin is 5 inches from the PAP and the CG is 3 inches.

You will also hear about placing the mass bias in a quadrant around the grip.  

thank you I will try to find it