Photo and specs courtesy of Brunswick. Reproduced with credit to the maker.
How it moves
Hockey-stick turn (asymmetric core). Dotted is skid, then the turn, then the roll into the pocket. Estimated from the coverstock, finish, core, and differential for a right-handed bowler with medium revs on a house shot. Lane conditions, speed, and layout move all of this.
How much the ball wants to hook, 1 (straight, a spare ball) to 10 (the strongest oil-eaters). The maker publishes no number for this ball, so this is estimated from the coverstock, core, finish, and differential.
Coverstock
Propel X Pearl
Reactive pearl
Core
MACE Medium RG
Asymmetric
Factory finish
500 Siaair, Rough Buff
Color
Black / Purple Pearl
Released
2010-11-08
USBC
Approved 2010-10-01
Weights and specs
Weight
RG
Differential
Int. diff
12 lb
2.61
0.043
0.011
13 lb
2.59
0.043
0.011
14 lb
2.56
0.050
0.020
15 lb
2.54
0.050
0.020
16 lb
2.53
0.050
0.020
Surface
Coarse grit
Coarse and fine
Fine grit or polish
500 Siaair, Rough Buff. Bites through heavy oil, so the ball reads the lane early and hooks sooner. Sanded balls (500 to 1000 grit) live here. Surface changes over games, and a pro shop can take any ball either way with a pad.
Balls like this
Same coverstock and core type; the closest company for this ball in a bag.
