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Proof Pearl

Outer shell of the ball
Prime Response Pearl
Surface texture on the ball (sanded, polished, etc)
500, 1000 Siaair / Crown Factory Compound
Lane Condition
Length and/or amount of oil on the lane
Medium to heavy oil
Color of the ball
Black / Smoke Pearl
Available weights
16-12 LBS
Weight block inside the ball
Core Type
Basic shape type of the core (Symmetric, Asymmetrical, Pancake)
Radius of Gyration: measurement related to weight distribution of the core. This affects how quickly a ball will get in to a roll. A ball with a higher RG will roll later. A ball with lower RG will roll sooner.
16 LB. - 2.506
15 LB. - 2.519
14 LB. - 2.538
13 LB. - 2.589
12 LB. - 2.612
Difference between the RG of the core's x-axis and y-axis. Indicates track flare potential and stability. A higher differential means more flare potential and less stabilty. A low differential ball will be more stable and have less flare potential.
16 LB. - 0.052
15 LB. - 0.052
14 LB. - 0.052
13 LB. - 0.043
12 LB. - 0.043
Intermediate Differential 
Difference between the RG of the core's x-axis and Z-axis on an asymmetrical core. Indicates the asymmetry of the core. A higher intermediate differential ball will be less stable and will transition more quickly from skid to roll than a ball with lower intermediate differential.

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Proof Pearl Honor Roll

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  • CHARLES PRICE256-274-279 = 809
  • Brad Brooks 268-275-290=833
  • Brad Brooks 300-276-227=803
  • Frank Ross793 257 279 257

Proof Pearl Product Notes

Follow up to a great ball!

It’s been a long-time since we’ve tested a ball like the Proof. A ball that looked great for everyone regardless of style and bowlers all over the world have confirmed this. While the Proof is known as a great ball, we are excited to follow it up with the Proof Pearl, a shiny version that gives you the same great reaction, that’s intended for more medium oil lane conditions.

DynamiCore Technology

The Proof Pearl uses DynamiCore – the industry leading innovation in outer core technology developed by Brunswick Bowling Products. This leap in bowling ball technology is a more durable outer material that yields less compression upon impact increasing hitting power and creating an undeniable difference in sound and pin carry.

Click HERE to learn more about DynamiCore Technology.

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