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Manufacturer Brunswick Drilling Layouts
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C(System) Performance

Brunswick C(System)3.5 Bowling BallC(System)3.5
 Basic Asymmetrical
Brunswick C(System)2.5C(System)2.5
 Basic Asymmetrical

Advanced Performance

Brunswick Diamondback Bowling Ball Diamondback
 Basic Symmetrical
Brunswick Copperhead Copperhead
 Basic Symmetrical
Brunswick BVP Wizard BVP Wizard
 Basic Symmetrical
Brunswick BVP Ambush BVP Ambush
 Basic Symmetrical
Brunswick BVP Goliath BVP Goliath
 Basic Symmetrical
Brunswick BVP Mammoth BVP Mammoth
 Basic Symmetrical
Brunswick BVP Nemesis BVP Nemisis
 Basic Symmetrical
Brunswick BVP Punisher BVP Punsiher
 Basic Symmetrical
Brunswick BVP Rampage BVP Rampage
 Basic Symmetrical
Brunswick BVP Sidewinder BVP SideWinder
 Basic Symmetrical

Pro Performance

Brunswick Evil Siege Bowling BallEvil Siege
 Basic Asymmetrical
Brunswick Twisted Fury DestructionT.F. Destruction
 Basic Asymmetrical
Brunswick Twisted FuryTwisted Fury
 Basic Asymmetrical
Twisted Fury Solid
 Basic Asymmetrical
Fury Pearl
 Basic Symmetrical
Absolute Inferno
 Basic Symmetrical
Blazing Inferno
 Low Differential
Inferno
 Basic Symmetrical
Intense Inferno
 Basic Symmetrical
Radical Inferno
 Basic Symmetrical
Raging Inferno
 Basic Symmetrical
Scorchin' Inferno
 Basic Symmetrical
Smokin' Inferno
 Basic Symmetrical
Total Inferno
 Basic Symmetrical
Ultimate Inferno
 Basic Symmetrical

High Performance

Brunswick Wild CardWild Card
  Basic Symmetrical
Brunswick Wild ThingWild Thing
  Basic Symmetrical
Brunswick Wild RideWild Ride
 Basic Asymmetrical
Brunswick Attack ZoneAttack Zone
 Seven Popular Layouts
Battle Zone
 Seven Popular Layouts
Blast Zone
 Basic Asymmetrical
Command Zone
 Seven Popular Layouts
Command Zone Arc
 Seven Popular Layouts
Contact Zone
 Seven Popular Layouts
Control Zone
 Seven Popular Layouts
Danger Zone
 Seven Popular Layouts
Danger Zone Red Alert
 Seven Popular Layouts
Demolition Zone
 Seven Popular Layouts
Impact Zone
 Seven Popular Layouts
Impulse Zone
 Basic Asymmetrical
Maxxx Zone
 Basic Asymmetrical
Pro Active Zone
 Seven Popular Layouts
Red Zone
 Basic Asymmetrical
Riot Zone Purple Pearl
 Seven Popular Layouts
Smash Zone
 Basic Asymmetrical
Speed Demon Zone
 Seven Popular Layouts
Speed Zone
 Seven Popular Layouts
Speed Zone Blue Vapor
 Seven Popular Layouts
Strike Zone
 Basic Asymmetrical
Time Zone
 Basic Asymmetrical
Vapor Zone
 Basic Asymmetrical
Ultra Zone
 Basic Asymmetrical
Warp Zone
 Basic Asymmetrical
Zone Classic
 Basic Asymmetrical
Zone X High Differential
 Seven Popular Layouts
Zone X Low Differential
 Seven Popular Layouts
Fuze Detonator
 Seven Popular Layouts
Fuze Detonator
 Seven Popular Layouts
Fuze Eliminator
 Seven Popular Layouts
Fuze Ignitor
 Seven Popular Layouts
Fuze Navy Sparkle
 Seven Popular Layouts
Fuze Purple Pearl
 Seven Popular Layouts
Raging Red Fuze
 Seven Popular Layouts

Affordable Performance

Brunswick AvalancheAvalanche Green Pearl
  Basic Symmetrical
Brunswick Avalanche Slide Avalanche Slide
 Basic Symmetrical
Brunswick Avalanche Solid Avalanche Solid
 Basic Symmetrical
Avalanche Pearl
 Basic Symmetrical
Black/Red Monster
 Basic Symmetrical
Brimstone Red Monster
 Basic Symmetrical
Monster Bruiser
 Basic Symmetrical
Monster Frenzy
 Basic Symmetrical
Monster Screamer
 Basic Symmetrical
Monster Slayr
 Basic Symmetrical
Monster Smasher
 Basic Symmetrical
Swamp Monster
 Basic Symmetrical
Purple Pro Active Monster
 Basic Symmetrical

Groove Series

Brunswick Power GroovePower Groove Reactive
  Basic Symmetrical
Brunswick Power GroovePower Groove Reactive
  Basic Symmetrical
Brunswick Power GroovePower Groove Reactive
  Basic Symmetrical
Groove Dynamic Reactive Blackberry
  Basic Symmetrical
Groove Jade Pearl
  Basic Symmetrical
Groove Reactive Blue Orange Sparkle
  Basic Symmetrical
Groove Urethane
  Basic Symmetrical
Power Groove Blue Ice
  Basic Symmetrical
Power Groove Dry/R Pearl
  Basic Symmetrical
Power Groove Neon Green/Purple Pearl
  Basic Symmetrical
Power Groove Pro Active Plum Pearl
  Basic Symmetrical
Power Groove Reactive
  Basic Symmetrical

International Releases

Active Zone
 High Differential
Ambitious
 High Differential
Comfort Zone
 Basic Asymmetrical
Digital Fuze
 Not Currently Available
Express Zone H
 High Differential
Express Zone S
 Basic Asymmetrical
Galaxy Regulus
 Low Differential
Majestic Zone I
 Low Differential
Mega Zone H
 Low Differential
Mega Zone S
 Low Differential
Red alert Edge
 High Differential
Red Alert Limited
 Not Currently Available
Red Crown 2
 Not Currently Available
Revolution R One Plasma
 Low Differential
Revolution Zest Rebel
 High Differential
Quantum Blue/Purple
 NotCurrently Available
Quantum Blue/Red
 Not Currently Available
Qunatum Fire
 Not Currently Available
Quantum Hook
 Low Differential
Quantum Purple/Silver
 Low Differential
Quantum Raven
 Not Currently Available
Quantum Supreme
 Low Differential
Qunatum Violet Hook
 Not Currently Available
Quantum Violet Hook Dark
 Not Currently Availabe

Large Pin-Out Information

Balls with large pin-outs [4 Ã?Æ?�Ã?¯Ã?¿Ã?½Ã?Æ?�Ã?â??Ã?½ - 5 Ã?Æ?�Ã?¯Ã?¿Ã?½Ã?Æ?�Ã?â??Ã?½] are sometimes a cause of concern. Included are three drillings for large pin-out bowling balls. The first two layouts place the pin well above the finger holes. This position will provide slightly more length than the more common lower pin layouts. The third layout produces an earlier roll giving the ball driller a full range of ball reaction options when drilling large pin-outs.

Tame Layout - Delayed Roll
Pin close to the span line above the fingers.
Aggressive Layout - Delayed Roll
Pin close to the leverage position above the fingers.
Aggressive Layout - Earlier Roll
Pin under the fingers
CG (Center of Gravity) in the 4:30 direction
X-hole to bring the ball back to statically legal.

Layout 1 - Tame Layout (Delayed Roll)

Tame Layout With Delayed Roll
Description:
Pin above the finger 5 Ã?Æ?�Ã?¯Ã?¿Ã?½Ã?Æ?�Ã?â??Ã?½" from axis - Typical semi-roller
CG (Center Gravity)/Heavy Spot below the grip center for approx. Ã?Æ?�Ã?¯Ã?¿Ã?½Ã?Æ?�Ã?â??Ã?¾ oz. positive side weight.

Layout 2 - Aggressive Layout (Delayed Roll)

Aggressive Layout With Delayed Roll
Description:
Pin above the finger 3 3/8" from axis - Typical semi-roller
CG (Center Gravity)/Heavy Spot below the grip center for approx. Ã?Æ?�Ã?¯Ã?¿Ã?½Ã?Æ?�Ã?â??Ã?¾" positive side weight.

Layout 3 - Aggressive Layout (Earlier Roll)

Aggressive Layout with Early Roll
Description:
Place the pin near the span line, 5 Ã?Æ?�Ã?¯Ã?¿Ã?½Ã?Æ?�Ã?â??Ã?½" from axis and at least 1 Ã?Æ?�Ã?¯Ã?¿Ã?½Ã?Æ?�Ã?â??Ã?½" below the fingers.
Place the CG (Center Gravity)/Heavy Spot in the positive/thumb quadrant at a 4:30 orientation from the grip center.
Drill X-hole in the positive/thumb quadrant approx. 6 Ã?Æ?�Ã?¯Ã?¿Ã?½Ã?Æ?�Ã?â??Ã?½" out in the 4:30 direction, brining the ball back to statically legal amount of side weight.
This X-hole position will increase track flare and raise the bow-tie position making this layout usable for high to low track semi-roller players.

Basic Asymmetric Layout 1

Basic Asymmetric Layout 2

Basic Asymmetric Layout 3

Basic Asymmetric Layout 4

Basic Asymmetric Layout 5

Basic Asymmetric Layout 6

Basic Asymmetric Layout 7

Basic Symmetric Layout 1

Basic Symmetric Layout 2

Basic Symmetric Layout 3

Basic Symmetric Layout 4

Basic Symmetric Layout 5

Basic Symmetric Layout 6

Basic Symmetric Layout 7

Three Peice Core Layouts & Information

Factoring the PAP

Depending on your PAP measurements, the CG may be further away or closer to the center of span than is illustrated. The important factor is its distance from the PAP, not the relationship of the CG to the center of the span.

This drilling layout is for right-handed bowlers, reverse image for left-handed bowler.

Information on the 3 Piece Core

    The 3-piece, full-size core has been an industry staple throughout bowling's history. The original core construction of a bowling ball was a single density sphere. Technology evolved and a weight mass was placed inside the upper edge of the core to counterbalance the weight that is removed from the top half of the ball during the drilling process, creating top weight. Although there is not a limit on top weight in an un-drilled ball, the USBC restricts the amount of top or bottom weight in a drilled ball to 3 ounces. Ebonite's upper limit on top weight in an un-drilled ball is five ounces and lower limit is one and one-half ounces. The upper limit on lighter weight balls is on a descending sliding scale to reflect the density differences on the core weight. This ensures that the drilled ball will be within USBC specifications for top/bottom weight.


    A higher density polyester compound is poured into the core mold and is allowed to harden before the lower density material, which makes up the rest of the core, is added. This high density weight mass has the same round contour as the core on one side and is flat on the other side. Appropriately, the name "pancake" has been assigned to this weight mass. Bowlers found a stronger hook potential when the pancake was introduced to the core construction. The amount of top weight in an un-drilled ball can be altered by varying the density of the pancake material or by increasing its thickness. Higher top weight creates a ball reaction that goes further down the lane and has a stronger backend hook. Lower top weight causes an earlier breakpoint and a smoother hook pattern. The center of the top weight is signified by a mark called the center of gravity. It is called "CG" for short.


    Moving the CG above the center of span, towards the fingers, creates finger weight. This increases the skid characteristics of the ball. Moving the CG below the center of span, towards the thumb, creates thumb weight. This causes an earlier breakpoint. Moving the CG to the right of the center of span (to the left of the span for left-handers) creates positive side weight. This increases the overall hook. And moving the CG to the left of the span (to the right of the span for left-handers) creates negative side weight. This reduces the amount of hook. The USBC limit on finger, thumb, positive, or negative weights is 1 ounce.


    The 3-piece, full size core is higher in RG and low in RG Differential. The higher RG creates a delayed breakpoint. The low RG differential results in an easy to control, lower hook potential. The 3-piece core is best for drier lanes, slow ball speeds, and those who like to play a straighter line to the pocket.


    Choosing the proper ball construction and surface texture for your bowling style and lane condition will be the most important decision you and your pro shop operator will make. Choosing a drilling layout will alter the ball's characteristics within its performance parameters to fine-tune the overall reaction. Drilling layouts will not produce ball reaction without proper mechanics from the bowler and proper surface texture.

High & Low Differental Layout Information

Note: Finger, thumb and X-holes must have a least a moderate bevel and the riser Pin must be at least one inch from any drilled hole to comply with Brunswick warranty
These images are for right handed bowlers, reverse the images for left handed bowlers.

Determining Your Bowler Type

Brunswick's ball drilling instructions include eight layouts.

  • one group of four earlier rolling reactions (1E - 4E)
  • one group of four later rolling reactions(1L - 4L).

Both groups contain layouts that adjust performance from high flare and hook potential to low flare and hook potential. Not every layout is appropriate for all types of releases. Brunswick separates bowler's release characteristics by RPM rate and Track position.

  • High-RPM players and Medium-Low RPM players. High RPM players rev the ball at rates greater than 300 RPM. On the men's tour, rev rates range from approximately 250-450 RPM. Most of the men's tour players you see on TV would be considered High RPM players. High RPM players can be sensitive to "over-flaring" which can make the ball hook early and be inconsistent at the breakpoint. Brunswick recommends low to medium flare layouts for High-RPM rate players.
  • High-Track players and Medium-Low Track players. High Track players have tracks within 1 Ã?Æ?�Ã?¯Ã?¿Ã?½Ã?Æ?�Ã?â??Ã?½ of the thumb and finger holes and will usually have a horizontal axis measurement near 6 Ã?Æ?�Ã?¯Ã?¿Ã?½Ã?Æ?�Ã?â??Ã?½ from grip center. Medium-Low track players have tracks that are greater than 1 Ã?Æ?�Ã?¯Ã?¿Ã?½Ã?Æ?�Ã?â??Ã?½ from the thumb and finger holes and typically have horizontal axis measurements that are from 3 Ã?Æ?�Ã?¯Ã?¿Ã?½Ã?Æ?�Ã?â??Ã?½ - 5 Ã?Æ?�Ã?¯Ã?¿Ã?½Ã?Æ?�Ã?â??Ã?½ .

After determining your bowler type and ball reaction needs, see the table below for recommended layouts. The Symmetric Core Layout sheet is divided into two for "Earlier Rolling" and "Later Rolling" Reactions.

  • Earlier Rolling Reactions match up best to oilier and wet/dry lane conditions, or for players who have problems with the ball going too long before changing direction. These will typically be players you have high ball speeds and/or medium-low RPM rates.
  • Later Rolling Reactions match up best to shorter patterns and drier lane conditions, or for players who have problems with the ball hooking or changing directions too early. These will typically be players who have medium-slow ball speeds and/or high RPM rates.

Brunswick recommends that you position the Heavy-Spot /CG (Center Gravity) to end up with Ã?Æ?�Ã?¯Ã?¿Ã?½Ã?Æ?�Ã?â??Ã?¾ - 1 oz. of positive side weight and a small amount of finer/thumb weight (less than Ã?Æ?�Ã?¯Ã?¿Ã?½Ã?Æ?�Ã?â??Ã?¼ oz.) after drilling. This leaves the driller plenty of room to modify the ball reaction with an X-hole, yet doesn't require that an X-hole be used to make the ball USBC legal.

Chart Containing Information on High Differential Bowling Ball Drilling
A Chart that Contains Information on Low Differential Bowling Ball Drilling

High Differential Symmetric Core Layouts & Instructions

1E Drilling Layout (Heavy Oil)

Heavy Oil Drilling Layout 1E
Description:
Maximum hook potential for Medium-low RPM players.
This layout may hook early and be inconsistent at the breakpoint for High-RPM players, use layout 2E instead.
This layout may hit the finger holes for High-Track players, use layout 1L instead.

2E Drilling Layout (Medium Oil)

Medium Oil Drilling Layout 2E
Description:
Maximum hook potential for High-RPM players.
Medium hook potential for Medium-Low RPM players.
This layout may hit the finger holes for High-Track players, use layout 2L.

3E Drilling Layout (Oily Wet/Dry's)

Oily Wet.Dry's Layout 3E
Description:
Pin between axis and leverage for medium hook potential and early roll.
Helps moderate over reactions.
This layout may lack hitting power for Medium-Low RPM players.

4E Drilling Layout (Hooking Wet/Dry's)

Hooking Wet/Dry's Layout 4E
Description:
Smooth reaction for moderating wet/dry lane conditions.
Lower hook potential than layout 3E.
This layout may hit the finger holes for High-Track players, use layout 4L instead.

1L Drilling Layout (Heavy Oil)

Heavy Oil Layout 1L
Description:
Maximum hook potential with less mid-lane and more backed than layout 1E. For Medium-Low RPM players.
This layout may hook early and be inconsistent at the breakpoint for High-RPM players, use layout 2L instead.

2L Drilling Layout (Medium Oil)

Medium Oil Layout 2L
Description:
Maximum hook potential for High-RPM players.
Medium hook potential for Medium-Low RPM players.
Less mid-lane and more backend than layout 2E.

3L Drilling Layout (Hooking Heads)

Hooking Heads Drilling Layout 3l
Description:
High RG pin position with the pin above the fingers for length. X-hole positioned for increased flare.
Moderate hook potential with skid/snap arc to fight early hook in the heads.
Lower hook potential than 2L

4L Drilling Layout (Dry Lanes)

Dry Lanes Drilling Layouts 4L
Description:
Minimum hook potential for dry lanes and moderating over reactions
High RG pin position with the pin above the fingers for length.

Low Differential Symmetric Core Layouts & Instructions

1E Drilling Layout (Heavy Oil)

Heavy Oil Drilling Layout 1E
Description:
Maximum hook potential for heavy oil.
High-RPM players may not need the X-hole for maximum reaction. Add X-hole if extra reaction is desired.
This layout may hit the finger holes for High-Track players, use layout 1L instead.

2E Drilling Layout (Medium Oil)

Medium Oil Drilling Layout 2E
Description:
Medium hook potential
More length, softer backend and less hook, than layout 1E.
This layout may hit the finger holes for High-Track players, use layout 2L instead.

3E Drilling Layout (Oily Wet/Dry's)

Oily Wet/Dry's Drilling Layout 3E
Description:
Pin between axis and leverage for medium hook potential and early roll.
Helps moderate over reactions
This layout may lack hitting power for Medium-Low RPM players.

4E Drilling Layout (Hooking Wet/Dry's)

Hooking Wet/Dry's Drilling Layout 4E LD
Description:
Smooth reaction for moderating wet/dry conditions.
Lower hook potential than layout 3E.
This layout may hit finger holes for High-Track players, use layout 4L instead.

1L Drilling Layout (Heavy Oil)

Heavy Oil Drilling Layout 1L
Description:
Maximum hook potential with less mid-lane and more backend than layout 1E.
High-RPM players may not need the X-hole for maximum reaction. Add X-Hole if extra reaction is desired.

2L Drilling Layout (Medium Oil)

Medium Oil Drilling Layout 2L
Description:
Medium hook potential
More length, softer backend and less hook than layout 1L

3L Drilling Layout (Hooking Heads)

Hooking Heads Drilling Layout 3L
Description:
High RG pin position with the pin above the fingers for length. X-hole positioned for increase flare.
Moderate hook potential with skid/snap arc to fight early hook in the heads.
Lower hook potential than layout 2L.

4L Drilling Layout (Dry Lanes)

Dry Lanes Drilling Layout 4L
Description:
Minimum hook potential for dry lanes and moderating over reactions.
High RG pin position with the pin above the fingers for length.

Layout 1 & Only! Label

Three Piece Core Layout 1
Ball Choice:
All top weight
Reaction:
Delayed breakpoint, moderate backend on light to medium oil Suitable for.