Brunswick Bowling Ball Drilling Layouts for Symmetric & Asymmetric Balls

find recommended drilling layouts for brunswick bowling balls

On this page we will cover the asymmetric and symmetric Brunswick bowling ball drill sheets. It is important to remember that your positive axis point (PAP) may differ from the one used below for illustrations.

When your pro shop professional uses your PAP the images below may look a little different when applied to your new Brunswick bowling ball.

download asymmetric layouts pdf

download symmetrical layouts pdf

7 Asymmetrical Layouts to Use When Drilling Brunswick Bowling Balls

1 - Maximum Hook & Arc Drilling Layouts Good for most House Shots

Best pin out distance to use: 0”– 3 ½”
• Locator pin set at 45 degrees
• Pin below fingers (VAL angle 70 degrees)
• Rev’s up strong for maximum hook with a continuous back-end.
• Responds to the lane the soonest.
• Slowest response to friction. Low Track
• 1. P is the larger circle or pin on the ball that marks the top
of the core.
2. L is a smaller circle or pin that marks Preferential Spin Axis
(PSA / Mass Bias) of the ball
3. For left-handed bowlers use the mirror images of these layouts

• Note: Finger, thumb and X- holes must have at least a moderate bevel
and the riser Pin P must be at least one inch from any drilled hole to
comply with the Brunswick warranty.

2 - Mid-Lane Hook & Back-End Drilling Layout A favorite for fresh PBA and Sport Conditions

• Best pin out distance to use: 0”– 3 ½”
• Locator pin set at 60 degrees Medium Track
• Pin below fingers (VAL angle 70 degrees)
• This layout helps bowlers open up the
mid-lane and recover on heavy carry down
• Responds to the lane soon.
• Slow response to friction. Low Track
• 1. P is the larger circle or pin on the ball that marks the top
of the core.
2. L is a smaller circle or pin that marks Preferential Spin Axis
(PSA / Mass Bias) of the ball
3. For left-handed bowlers use the mirror images of these layouts
• Note: Finger, thumb and X- holes must have at least a moderate bevel
and the riser Pin P must be at least one inch from any drilled hole to
comply with the Brunswick warranty.

3 - Length & Back-End A favorite for broken down PBA and Sport Conditions

• Best pin out distance to use: 3”– 6”
• Locator pin set at 45 degrees Medium Track
• Pin above fingers (VAL angle 30 degrees)
• This layout helps bowlers open up the
mid-lane and recover on heavy carry down
• Responds to the lane late.
• Fast response to friction. Low Track
• 1. P is the larger circle or pin on the ball that marks the top
of the core.
2. L is a smaller circle or pin that marks Preferential Spin Axis
(PSA / Mass Bias) of the ball
3. For left-handed bowlers use the mirror images of these layouts
• Note: Finger, thumb and X- holes must have at least a moderate bevel
and the riser Pin P must be at least one inch from any drilled hole to
comply with the Brunswick warranty.

4 - Length Good for most broken down House Shots

• Best pin out distance to use: 3”– 6”
• Locator pin set at 70 degrees
• Pin above fingers (VAL angle 30 degrees)
• This layout helps bowlers open up the
mid-lane and recover on heavy carry down
• Responds to the lane the latest.
• Fastest response to friction. Low Track
• 1. P is the larger circle or pin on the ball that marks the top
of the core.
2. L is a smaller circle or pin that marks Preferential Spin Axis
(PSA / Mass Bias) of the ball
3. For left-handed bowlers use the mirror images of these layouts
• Note: Finger, thumb and X- holes must have at least a moderate bevel
and the riser Pin P must be at least one inch from any drilled hole to
comply with the Brunswick warranty.

Full Roller Layouts For asymmetric core bowling balls

These layouts are very general and will apply to every bowler differently based on multiple variables. These include the bowlers ball speed, rev rate, axis rotation & tilt, and lane conditions. All or most of these variables should be known so that the best possible layout can be chosen for each ball.

We recommend that you contact your local Pro Shop Professional for more detailed layouts and how to apply them to your game for each ball in your arsenal.

5 - Maximum Hook & Arc – Full Roller Asymmetric Core

• Best pin out distance to use: 3”– 6”
• This layout will give the bowler maximum hook
with a continuous back-end.
• 1. P is the larger circle or pin on the ball that marks the top
of the core.
2. L is a smaller circle or pin that marks Preferential Spin Axis
(PSA / Mass Bias) of the ball
3. For left-handed bowlers use the mirror images of these layouts

Note: Finger, thumb and X- holes must have at least a moderate bevel
and the riser Pin P must be at least one inch from any drilled hole to
comply with the Brunswick warranty.

6 - Length & Back-End – Full Roller Asymmetric Core

• Best pin out distance to use: 0”–3”
• This layout helps bowlers create length
with a strong back-end
• 1. P is the larger circle or pin on the ball that marks the top
of the core.
2. L is a smaller circle or pin that marks Preferential Spin Axis
(PSA / Mass Bias) of the ball
3. For left-handed bowlers use the mirror images of these layouts

Note: Finger, thumb and X- holes must have at least a moderate bevel and the riser Pin P must be at least one inch from any drilled hole to comply with the Brunswick warranty.

7 - Length – Full Roller Asymmetric Core

• Best pin out distance to use: 0”– 3”
• This layout helps bowlers create length with
a smooth arcing back-end
• 1. P is the larger circle or pin on the ball that marks the top
of the core.
2. L is a smaller circle or pin that marks Preferential Spin Axis
(PSA / Mass Bias) of the ball
3. For left-handed bowlers use the mirror images of these layouts

Note: Finger, thumb and X- holes must have at least a moderate bevel and the riser Pin P must be at least one inch from any drilled hole to comply with the Brunswick warranty.

7 symmetrical Layouts to Use When Drilling Brunswick Bowling Balls

1 - Maximum Hook & Arc Drilling Layouts Good for most House Shots

Best pin out distance to use: 0”– 3 ½”
Rev’s up strong for maximum hook with a continuous back-end.
Responds to the lane the soonest.
Slowest response to friction.

2 - Mid-Lane Hook & Back-End Drilling Layout A favorite for fresh PBA and Sport Conditions

Best pin out distance to use: 2”– 4”
This layout helps bowlers open up the mid-lane and recover on heavy carry down.
Responds to the lane soon.
Slow response to friction.

3 - Mid-Lane Hook & Back-End Drilling Layout A favorite for fresh PBA and Sport Conditions

Best pin out distance to use: 3”– 6”
This layout helps bowlers create length with a strong back-end.
Responds to the lane late
Fast response to friction.

4 - Mid-Lane Hook & Back-End Drilling Layout A favorite for fresh PBA and Sport Conditions

Best pin out distance to use: 3”– 6”
Length drilling with arcing back–end.
Responds to the lane the latest.
Fastest response to friction.

Full Roller Layouts For Symmetric core bowling balls

We recommend that you contact your local Pro Shop Professional for more detailed layouts and how to apply them to your game for each ball in your arsenal.