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Hammer Purple Solid Reactive

Photo and specs courtesy of bowwwl.com. Reproduced with credit to the maker.

How it moves

Foul lineArrows · 15 ft41 ft · board 6.54.9° entry
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.
Hammer

Purple Solid Reactive

Hook potential7.5 (est.)7.5 of 10, estimated

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
Reactive Solid
Reactive solid
Core
LED (w/ reactive coverstock)
Symmetric
Factory finish
500/1500 Siaair Micro Pad
Color
Not listed
Released
2022-11-18
USBC
Approved

Weights and specs

WeightRGDifferentialInt. diff
12 lb2.590.031—
13 lb2.600.025—
14 lb2.600.026—
15 lb2.590.027—
16 lb2.540.035—

Surface

oil · laneCoarse grit
oil · laneCoarse and fine
oil · laneFine grit or polish
500/1500 Siaair Micro Pad. Sanded then smoothed (1500 to 3000 grit): enough tooth for oil, enough gloss to get down the lane. Most box finishes. 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.