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AMF Bowling Ball Drilling Pattern #1
- Locate the mass bias by drawing a line from the pin through the CG.
- Find the location 6-3/4" from the pin along this line, and mark it with an 'MB.'
- This is the location of the mass bias or the 'secondary pin'.
- Place the major pin 5" from the player's PAP and place the 'MB' on the player's ball track next to the thumb hole.
- Use this layout for length with a medium backend reaction.
- This layout is great for medium to light oil. Also works well for players with higher rev rates.
All Ball Drilling Patterns | AMF Patterns
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