Bowling ball core · SWAG

SWAG Judge Core

Asymmetric SWAG core

An asymmetric core with early rev-up and high flare, built for medium to heavy oil. 2 of the 2 balls with this core are in stock at BowlersMart.

  • Asymmetric
  • RG 2.490
  • Diff 0.052
  • MB 0.019
SWAG Judge asymmetric core shape inside the ball

Specs

RG AT 15 LB

2.490

Early rev-up

Revs soonerRevs later

32% of the reactive and urethane balls we stock have a lower RG.

DIFFERENTIAL AT 15 LB

0.052

High flare

Less flareMore flare

75% of the reactive and urethane balls we stock have a lower differential.

MASS BIAS AT 15 LB

0.019

Strong asymmetry

MilderStronger

75% of the asymmetric reactive and urethane balls we stock have a lower mass bias.

RG How soon the ball revs up.Differential How much the ball can flare.Mass bias How asymmetric the core is.
SWAG Judge Core specs by ball weight (reference ball: SWAG Judge Pearl)
Weight RG DifferentialDiff Mass biasMB
16 lb 2.510 0.047 0.015
15 lbUsed on this page 2.490 0.052 0.019
14 lb 2.540 0.049 0.016
13 lb 2.570 0.050 0.014
12 lb 2.580 0.016 Not listed

Source: SWAG published specs, as listed on the SWAG Judge Pearl product page. RG and differential change with ball weight; use the row for the weight you throw. The highlighted 15 lb row is the one used on this page.

Balls with the SWAG Judge Core

2 of the 2 balls with the SWAG Judge Core are in stock at BowlersMart. Same core, different covers: pick the cover for the lanes you bowl on.

Pearl covers

Pearl covers go longer and turn harder at the end, best on medium oil.

SWAG Judge Pearl Bowling Ball

SWAG Judge Pearl

SWAG Witness Pearl Reactive

Medium to heavy oil

Sale price $184.95 Regular price $289.95In stock

Reactive covers

Reactive covers whose finish is not listed in our catalog.

SWAG Judge Bowling Ball

SWAG Judge

SWAG Witness Reactive

Medium to heavy oil

Sale price $184.95 Regular price $289.95In stock

Shop the 2 available balls with this core

Where the SWAG Judge sits

Each dot is a core in balls we stock. Cores close together roll alike; the cover and layout decide the rest.

Storm Element Tour A.I. Core, RG 2.470, diff 0.035DV8 Larceny Core, RG 2.471, diff 0.028DV8 Renegade Core, RG 2.499, diff 0.040Track I-Core Gen4, RG 2.480, diff 0.053Brunswick Vintage Light Bulb Low RG Core, RG 2.568, diff 0.032Brunswick Dual Centric Core, RG 2.509, diff 0.047Ebonite Big Time Core, RG 2.508, diff 0.054Hammer Stacked LED Core, RG 2.545, diff 0.047Hammer Vindicator Core, RG 2.474, diff 0.053Radical Vexed Variant Asymmetric Core, RG 2.490, diff 0.045Radical Modified Intel Symmetric Core, RG 2.483, diff 0.032Motiv Affliction V2 Core, RG 2.480, diff 0.055900 Global Conduit A.I. Core, RG 2.590, diff 0.050Roto Grip GEM A.I. Core, RG 2.490, diff 0.057Hammer Obsession Tour Core, RG 2.469, diff 0.034Hammer Super Offset Core, RG 2.524, diff 0.053Hammer Gas Mask Core, RG 2.500, diff 0.058Ebonite Turbo Core, RG 2.517, diff 0.040Ebonite Centrex Symmetrical Mass Bias Core, RG 2.466, diff 0.056Motiv Excel Core, RG 2.550, diff 0.030Motiv Detonator Core, RG 2.470, diff 0.055Storm Solarion A.I. Core, RG 2.480, diff 0.054SWAG Insanity Symmetric Core, RG 2.520, diff 0.034SWAG Fusion Core, RG 2.540, diff 0.036SWAG Watcher Symmetric Core, RG 2.510, diff 0.048Motiv Predator V2 Core, RG 2.470, diff 0.054Storm C3 Centripetal Control Core, RG 2.490, diff 0.029Roto Grip Rondure MaxD Core, RG 2.500, diff 0.058Hammer Vibe Core, RG 2.510, diff 0.042Hammer Aftermath Core, RG 2.520, diff 0.052Brunswick Alert Core, RG 2.478, diff 0.037Brunswick Rampart Core, RG 2.502, diff 0.051DV8 Collision Core, RG 2.462, diff 0.052Track MC2 Asym Core, RG 2.473, diff 0.046Radical Evil Eye Symmetric Core, RG 2.495, diff 0.046Ebonite Iron Fist V2 Core, RG 2.473, diff 0.053Storm Surge Core, RG 2.580, diff 0.024Roto Grip Hyped UP Core, RG 2.500, diff 0.042Roto Grip Morph-Wing Core, RG 2.510, diff 0.051Brunswick Fury Core, RG 2.524, diff 0.038Motiv Sigma Core, RG 2.470, diff 0.047Roto Grip Hustle Core, RG 2.530, diff 0.030900 Global Blast A.I. Core, RG 2.470, diff 0.055900 Global Strobe A.I. Core, RG 2.510, diff 0.052Radical Guru Core, RG 2.503, diff 0.044Track I-CORE 3.0, RG 2.486, diff 0.056DV8 Unholy Core, RG 2.504, diff 0.051Brunswick Infinity Core, RG 2.521, diff 0.051Storm Catalyst A.I. Core, RG 2.480, diff 0.053Hammer Gauntlet Core, RG 2.501, diff 0.050Hammer Raw Hammer Core, RG 2.537, diff 0.038Storm Atmos A.I. Core, RG 2.530, diff 0.042Storm Booster Core, RG 2.540, diff 0.046Track Shuttle Core, RG 2.480, diff 0.040Brunswick Light Bulb Core, RG 2.524, diff 0.030Radical Sneak Attack Core, RG 2.544, diff 0.036Motiv Gear Core, RG 2.480, diff 0.034Hammer Huntsman Core, RG 2.470, diff 0.050Hammer Super LED Core, RG 2.632, diff 0.034Ebonite Enhanced V2 Core, RG 2.480, diff 0.048DV8 Dualistic Core, RG 2.496, diff 0.045Radical Vexed Asymmetric Core, RG 2.498, diff 0.036Motiv Quadfire Core, RG 2.550, diff 0.043Track Stealth Core, RG 2.482, diff 0.056Brunswick Tiered Hexagon Core, RG 2.540, diff 0.045Columbia 300 Piranha Core, RG 2.554, diff 0.043Storm Torsion A.I. Core, RG 2.470, diff 0.050Storm Element Max A.I. Core, RG 2.470, diff 0.055Storm Radius Core, RG 2.610, diff 0.020Roto Grip Rondure Tour X Core, RG 2.480, diff 0.034SWAG Unreal Core, RG 2.510, diff 0.047SWAG Craze Core, RG 2.520, diff 0.030SWAG Serpent Asymmetric Core, RG 2.510, diff 0.048Motiv Overload Core, RG 2.480, diff 0.050DV8 Duality Core, RG 2.480, diff 0.036Hammer Spheroid Core, RG 2.480, diff 0.048Motiv Apex Predator Core, RG 2.520, diff 0.055Brunswick Danger Zone Core, RG 2.501, diff 0.048Storm RAD-TQ Core, RG 2.560, diff 0.051Storm Velocity Core, RG 2.480, diff 0.051Hammer Modified LED Core, RG 2.586, diff 0.027Epic Spark Core, RG 2.540, diff 0.049Motiv Hadron Dual Density Core, RG 2.500, diff 0.045Track Criterion ID Core, RG 2.496, diff 0.047Brunswick Zone Asymmetric Core, RG 2.478, diff 0.048Ebonite Entity Core, RG 2.515, diff 0.052Roto Grip Rocker A.I. Core, RG 2.480, diff 0.050Motiv Flux Core, RG 2.570, diff 0.015DV8 Mantra Core, RG 2.498, diff 0.047Hammer Gas Mask Low Diff Core, RG 2.500, diff 0.034Roto Grip RST A.I. Core, RG 2.520, diff 0.055Motiv Impulse V2 Core, RG 2.550, diff 0.050SWAG APX V1 Core, RG 2.500, diff 0.042900 Global Magna A.I. Core, RG 2.490, diff 0.044Columbia 300 Pulse PowerCOR Core, RG 2.468, diff 0.045KR Strikeforce Launch Core, RG 2.530, diff 0.047900 Global Ellipse Asymmetric A.I. Core, RG 2.480, diff 0.050Motiv Halogen Core, RG 2.550, diff 0.037Storm C3 A.I. Core, RG 2.480, diff 0.031Motiv Gear APG Core, RG 2.470, diff 0.036Radical Snapshot Symmetric Core, RG 2.523, diff 0.050Hammer Huntsman Tour Core, RG 2.472, diff 0.036Hammer LED Core, RG 2.650, diff 0.015Storm Inverted Fe2 Core, RG 2.570, diff 0.046Storm Capacitor Core, RG 2.570, diff 0.022Hammer High Rev Offset Core (pictured: Hammer 3-D Offset Assault Bowling Ball)1SWAG Dragon Asymmetric Core (pictured: SWAG Black Dragon Bowling Ball)2Radical No Doubt Symmetric Core (pictured: Radical No Doubt Hybrid Bowling Ball)3Radical Outer Limits Asymmetric Core (pictured: Radical Outer Limits Black Hole Bowling Ball)4Radical Torpedo Asymmetric Core (pictured: Radical Torpedo Direct Hit Bowling Ball)5SWAG Executioner Asymmetric Core (pictured: SWAG Executioner Solid Bowling Ball)6SWAG Judge Core (pictured: SWAG Judge Bowling Ball)EARLY REV-UPMID-LANELATER REV-UPHIGH FLAREMEDIUMLOW FLARE2.442.482.522.562.602.642.680.0100.0200.0300.0400.0500.060RG at 15 lbDifferential at 15 lb← Revs up soonerRevs up later →More flare ↑Less flare ↓

Nearest cores, zoomed in

Hover or tap a dot for that core’s numbers. Click a dot to open its page. Drag to move around when zoomed in. The same RG and differential do not guarantee the same ball motion.

This core 1 Nearest cores Other cores

Nearest cores to the SWAG Judge Core
Core Brand Shape RG Diff vs this core
Hammer 3-D Offset Assault Bowling Ball1Hammer High Rev Offset CorePictured: Hammer 3-D Offset Assault
 Hammer Asymmetric 2.489 0.053 RG −0.001 · Diff +0.001
SWAG Black Dragon Bowling Ball2SWAG Dragon Asymmetric CorePictured: SWAG Black Dragon
 SWAG Asymmetric 2.490 0.050 RG 0.000 · Diff −0.002
Radical No Doubt Hybrid Bowling Ball3Radical No Doubt Symmetric CorePictured: Radical No Doubt Hybrid
 Radical Symmetric 2.485 0.051 RG −0.005 · Diff −0.001
Radical Outer Limits Black Hole Bowling Ball4Radical Outer Limits Asymmetric CorePictured: Radical Outer Limits Black Hole
 Radical Asymmetric 2.499 0.051 RG +0.009 · Diff −0.001
Radical Torpedo Direct Hit Bowling Ball5Radical Torpedo Asymmetric CorePictured: Radical Torpedo Direct Hit
 Radical Asymmetric 2.480 0.052 RG −0.010 · Diff 0.000
SWAG Executioner Solid Bowling Ball6SWAG Executioner Asymmetric CorePictured: SWAG Executioner Solid
 SWAG Asymmetric 2.500 0.051 RG +0.010 · Diff −0.001

Matches use 15 lb RG and differential.

Drilling and tools

Drilling layoutsLayout guides for symmetric and asymmetric ballsDual angle converterTurn a pin to PAP layout into a dual angle layout

Turn on JavaScript to compare with your ball.Balls with the SWAG Judge Core2 of the 2 balls with the SWAG Judge Core are in stock at BowlersMart. Same core, different covers: pick the cover for the lanes you bowl on.Pearl coversPearl covers go longer and turn harder at the end, best on medium oil.

From SWAG’s description

Questions bowlers ask

What is the RG of the SWAG Judge Core?

At 15 lb the SWAG Judge Core has an RG of 2.490. It ranges from 2.490 to 2.580 across the listed weights.

What is the 14 lb RG of the SWAG Judge Core?

At 14 lb the RG is 2.540.

What is the differential of the SWAG Judge Core?

At 15 lb the differential is 0.052. The mass bias is 0.019.

Which bowling balls use the SWAG Judge Core?

SWAG Judge Bowling Ball, SWAG Judge Pearl Bowling Ball. 2 are in stock now.

How do the SWAG Judge Core specs change by weight?

At 16 lb: RG 2.510, differential 0.047, mass bias 0.015. At 12 lb: RG 2.580, differential 0.016, mass bias Not listed.

How does the SWAG Judge Core compare with my ball?

Type the ball you throw into the Compare with your ball box on this page. It shows the RG and differential side by side and saves your bag for every core page.

Sources and method

Specs. SWAG published specs, as listed on the SWAG Judge Pearl product page, as published by the manufacturer.

Baseline. The baseline is 212 in-stock, published reactive and urethane balls. Plastic and polyester covers, 2-piece, 3-piece and pancake cores, missing covers and missing RG or differential values are excluded.

Percentiles. Percentiles are the share of baseline balls with a strictly lower or higher value; ties are not counted.

Nearest cores. Nearest cores are ranked by distance on standardized 15 lb RG and differential, with the same symmetric or asymmetric shape preferred among near ties (distance bands of 0.1).

Mass bias. Mass bias is compared among asymmetric balls with numeric mass bias only.

Updated. Catalog and page updated 2026-10-16.

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