Photo and specs courtesy of bowwwl.com. Reproduced with credit to the maker.
How it moves
Arcing turn (symmetric 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
Solid Urethane
Urethane
Core
Grenade
Symmetric
Factory finish
1000 Sanded
Color
Not listed
Released
1985-01-01
USBC
Approved
Weights and specs
Weight
RG
Differential
Int. diff
15 lb
2.55
0.020
—
Surface
Coarse grit
Coarse and fine
Fine grit or polish
1000 Sanded. 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.
