What you see as flare ring is how much the core moves towards its stable position while rotating. It depends on several factors. Technically, both the differential and the pin position play a major part in how much a ball flares. The differential shows you how much flare potential the core has - the bigger, the wider the flare CAN be. The maximum flare would become visible in a leverage position, pin 3 3/8" from PAP.
This said, the pin placement relative to the PAP defines how much of the potential is actually tapped. The same drilling on different cores can have different flare results, depending on the core's differential (and also the number of revs and speed a bowler puts into the ball).
Basically, the more flare rings you see and the bigger tehy are apart, the more the ball will move - but axis rotation and tilt also play a role here, so it is just a basic statement. I have a Pure Hammer, pin at 5+" from PAP, and it just shows 2" or flare rings very close to each other, but the ball moves a lot, more than one would expect though the low flare setup!
To get flare rings closer to each other fater the ball is drilled, you might use a flare reducing balance hole, placed above the PAP.
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DizzyFugu - Reporting from Germany
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