Bowling ball core · Brunswick

Brunswick QCS-12 Core

Asymmetric Brunswick core

An asymmetric core with mid-lane rev-up and medium flare, built for medium to heavy oil. Balls with this core are no longer available at BowlersMart.

  • Asymmetric
  • RG 2.502
  • Diff 0.048
  • MB 0.012

Specs

RG AT 15 LB

2.502

Mid-lane rev-up

Revs soonerRevs later

52% of the reactive and urethane balls we stock have a lower RG.

DIFFERENTIAL AT 15 LB

0.048

Medium flare

Less flareMore flare

55% of the reactive and urethane balls we stock have a lower differential.

MASS BIAS AT 15 LB

0.012

Mild asymmetry

MilderStronger

11% 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.
Brunswick QCS-12 Core specs by ball weight
Weight RG DifferentialDiff Mass biasMB
16 lb 2.511 0.042 0.010
15 lbUsed on this page 2.502 0.048 0.012
14 lb 2.519 0.048 0.011
13 lb 2.597 0.041 0.014
12 lb 2.593 0.041 0.014

Source: Brunswick published specs, as shown on BowlersMart’s original Brunswick QCS-12 core page (2022). 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.

Looking for a ball like your Brunswick QCS-12?

Balls with the Brunswick QCS-12 Core are no longer available at BowlersMart. These in-stock balls have the closest RG and differential.

Brunswick Danger Zone Bowling Ball

Brunswick Danger Zone

Brunswick HK22 PowerKoil 26 Reactive

Medium to heavy oil

Sale price $119.95 Regular price $199.95In stock
Brunswick Strategy Bowling Ball

Brunswick Strategy

Brunswick HK22-C2 Evo Pearl Reactive

Medium to heavy oil

Sale price $169.95 Regular price $289.95In stock
Hammer Spawn Bowling Ball

Hammer Spawn

Hammer HK22 C2 Solid Reactive

Medium to heavy oil

Sale price $194.95 Regular price $279.95In stock
SWAG Unknown Solid Bowling Ball

SWAG Unknown Solid

SWAG Mystery Solid AP26

Medium to heavy oil, medium oil

Sale price $149.95 Regular price $249.95In stock
SWAG Serpent Hybrid Bowling Ball

SWAG Serpent Hybrid

SWAG Serum AP26 Hybrid Reactive

Medium to heavy fresh oil

Sale price $159.95 Regular price $259.95In stock
SWAG Unreal Solid Bowling Ball

SWAG Unreal Solid

SWAG Never Quit AP26 Solid Reactive

Medium to heavy fresh oil

Sale price $149.95 Regular price $249.95In stock

Balls with the Brunswick QCS-12 Core

None of the 1 balls with the Brunswick QCS-12 Core are in stock at BowlersMart right now.

Show 1 ball no longer available at BowlersMart
More bowling balls with the Brunswick QCS-12 Core
Ball Cover First seen
Brunswick Quantum EVO Solid Bowling Ball Brunswick Evolution Solid Reactive November 2021

Where the Brunswick QCS-12 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 0.032Ebonite 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 0.048SWAG Dragon Asymmetric Core, RG 2.490, diff 0.050SWAG Executioner Asymmetric Core, RG 2.500, diff 0.051Motiv 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 0.053Radical No Doubt Symmetric Core, RG 2.485, diff 0.051Storm 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 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 0.030Radical Torpedo Asymmetric Core, RG 2.480, diff 0.052Motiv Overload Core, RG 2.480, diff 0.050DV8 Duality Core, RG 2.480, diff 0.036Hammer Spheroid Core, RG 2.480, diff 0.048Radical Outer Limits Asymmetric Core, RG 2.499, diff 0.051Motiv Apex Predator Core, RG 2.520, diff 0.055Storm 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 0.045Brunswick 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 0.015Hammer 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 0.042SWAG Judge Core, RG 2.490, diff 0.052900 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 High Rev Offset Core, RG 2.489, diff 0.053Hammer 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 0.022Brunswick Danger Zone Core (pictured: Brunswick Danger Zone Bowling Ball)1DV8 Mantra Core (pictured: DV8 Mantra Solid Bowling Ball)2Track Criterion ID Core (pictured: Track Criterion Inverse Bowling Ball)3Hammer Gauntlet Core (pictured: Hammer Spawn Bowling Ball)4Brunswick Dual Centric Core (pictured: Brunswick Strategy Logic Bowling Ball)5SWAG Serpent Asymmetric Core (pictured: SWAG Serpent Hybrid Bowling Ball)6Brunswick QCS-12 Core (pictured: Brunswick Quantum EVO Solid 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.

Same family: Brunswick QCS-24 Core Same family: Brunswick QCS-18 Core

This core 1 Nearest cores Other cores

Nearest cores to the Brunswick QCS-12 Core
Core Brand Shape RG Diff vs this core
Brunswick Danger Zone Bowling Ball1Brunswick Danger Zone CorePictured: Brunswick Danger Zone
 Brunswick Symmetric 2.501 0.048 RG −0.001 · Diff 0.000
DV8 Mantra Solid Bowling Ball2DV8 Mantra CorePictured: DV8 Mantra Solid
 DV8 Asymmetric 2.498 0.047 RG −0.004 · Diff −0.001
Track Criterion Inverse Bowling Ball3Track Criterion ID CorePictured: Track Criterion Inverse
 Track Asymmetric 2.496 0.047 RG −0.006 · Diff −0.001
Hammer Spawn Bowling Ball4Hammer Gauntlet CorePictured: Hammer Spawn
 Hammer Asymmetric 2.501 0.050 RG −0.001 · Diff +0.002
Brunswick Strategy Logic Bowling Ball5Brunswick Dual Centric CorePictured: Brunswick Strategy Logic
 Brunswick Asymmetric 2.509 0.047 RG +0.007 · Diff −0.001
SWAG Serpent Hybrid Bowling Ball6SWAG Serpent Asymmetric CorePictured: SWAG Serpent Hybrid
 SWAG Asymmetric 2.510 0.048 RG +0.008 · Diff 0.000

Matches use 15 lb RG and differential.

Drilling and tools

Brunswick drill sheetsLayout 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 Brunswick QCS-12 CoreNone of the 1 balls with the Brunswick QCS-12 Core are in stock at BowlersMart right now.Show 1 ball no longer available at BowlersMartMore bowling balls with the Brunswick QCS-12 CoreBallCoverFirst seenBrunswick Quantum EVO Solid Bowling BallBrunswick Evolution Solid ReactiveNovember 2021Where the Brunswick QCS-12 sitsEach dot is a core in balls we stock. Cores close together roll alike; the cover and layout decide the rest.All coresSymmetricAsymmetricBrunswick onlyAny brand900 GlobalBrunswickColumbia 300DV8EboniteEpicHammerKR StrikeforceMotivRadicalRoto GripSWAGStormTrack+−ResetZoom to this coreStorm 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 0.032Ebonite 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 Symm

From Brunswick’s description

Questions bowlers ask

What is the RG of the Brunswick QCS-12 Core?

At 15 lb the Brunswick QCS-12 Core has an RG of 2.502. It ranges from 2.502 to 2.597 across the listed weights.

What is the 14 lb RG of the Brunswick QCS-12 Core?

At 14 lb the RG is 2.519.

What is the differential of the Brunswick QCS-12 Core?

At 15 lb the differential is 0.048. The mass bias is 0.012.

Which bowling balls use the Brunswick QCS-12 Core?

Brunswick Quantum EVO Solid Bowling Ball. 0 are in stock now.

Can I still buy a ball with the Brunswick QCS-12 Core?

Balls with this core are currently unavailable at BowlersMart. Closest in-stock alternatives by RG and differential include Brunswick Danger Zone Bowling Ball, Brunswick Strategy Bowling Ball, Hammer Spawn Bowling Ball, SWAG Unknown Solid Bowling Ball, SWAG Serpent Hybrid Bowling Ball, SWAG Unreal Solid Bowling Ball.

How do the Brunswick QCS-12 Core specs change by weight?

At 16 lb: RG 2.511, differential 0.042, mass bias 0.010. At 12 lb: RG 2.593, differential 0.041, mass bias 0.014.

How does the Brunswick QCS-12 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. Brunswick published specs, as shown on BowlersMart’s original Brunswick QCS-12 core page (2022), 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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