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How to Measure Length of Pull: A Comprehensive Guide

The length of pull (LOP) is a critical measurement for ensuring proper fit and comfortable shooting with any firearm, especially rifles and shotguns. It refers to the distance from the trigger to the butt of the stock. A correct length of pull allows for a comfortable and consistent shooting position, leading to improved accuracy and reduced felt recoil. Conversely, an incorrect length of pull can cause discomfort, poor shooting form, and even injury. This comprehensive guide will explore the importance of length of pull, provide step-by-step instructions on how to measure it accurately, and discuss how to adjust it for optimal performance. Understanding how to measure length of pull is a fundamental skill for any serious shooter or gun owner.

Why is Length of Pull Important?

The length of pull significantly impacts several aspects of shooting:

Comfort: A properly fitted rifle or shotgun is more comfortable to shoot. A length of pull that is too long can cause the shooter to reach uncomfortably for the trigger, while a length of pull that is too short can cause the shooter to hunch over, leading to fatigue and discomfort.
Accuracy: Consistent shooting form is essential for accuracy. The correct length of pull promotes a stable and repeatable shooting position, allowing for better control and more precise shots.
Recoil Management: A well-fitted stock helps distribute recoil energy more evenly, reducing felt recoil and muzzle rise. This is especially important for larger caliber firearms.
Safety: An incorrect length of pull can compromise safety. For example, a length of pull that is too long can prevent the shooter from properly controlling the firearm, increasing the risk of accidental discharge.

Tools Needed to Measure Length of Pull

Before you begin, gather the necessary tools:

Measuring Tape: A flexible measuring tape is essential for accurate measurements.
Rifle or Shotgun: Obviously, you’ll need the firearm you want to measure. Ensure it is unloaded and safe.
Pencil and Paper (Optional): To record your measurements.
Helper (Optional): Having someone to assist can make the process easier, especially when measuring length of pull on yourself.

Step-by-Step Guide to Measuring Length of Pull

Here’s a detailed guide on how to accurately measure the length of pull:

Method 1: Measuring on Yourself

Assume a Shooting Stance: Stand as you would when shooting, with your feet shoulder-width apart and your shoulders squared to an imaginary target.
Position Your Arm: Bring your shooting arm up as if you are holding the firearm. Your elbow should be slightly bent.
Measure from the Middle of the Trigger: Have a helper measure the distance from the middle of the trigger to the point on your shoulder where the butt of the stock would comfortably rest. This point is typically where the shoulder pocket is located.
Record the Measurement: Note the measurement in inches or millimeters. This is your approximate length of pull.

Method 2: Measuring on a Firearm

Ensure the Firearm is Unloaded: Safety first! Double-check that the firearm is unloaded before proceeding.
Position the Firearm: Place the firearm on a stable surface, such as a workbench.
Measure from Trigger to Butt: Using a measuring tape, measure the distance from the middle of the trigger to the center of the butt of the stock. Ensure the measuring tape follows a straight line.
Record the Measurement: Note the measurement in inches or millimeters. This is the length of pull of the firearm.

Determining the Ideal Length of Pull

While the above methods provide a measurement, determining the *ideal* length of pull requires a bit more consideration. Several factors influence the optimal LOP:

Body Size and Shape: Taller individuals generally require a longer length of pull, while shorter individuals require a shorter one.
Arm Length: People with longer arms may prefer a longer length of pull.
Shooting Stance: Different shooting stances may require slight adjustments to the length of pull.
Clothing: Heavy clothing, such as hunting jackets, can effectively shorten the length of pull.

A common method for approximating the ideal length of pull is the “elbow test.” To perform this test:

Stand Straight: Stand upright with your back against a wall.
Bend Your Arm: Bend your shooting arm at a 90-degree angle, as if you are holding the firearm.
Measure to Your Finger: Have someone measure the distance from the wall to the crease of your elbow.
Adjust for Comfort: This measurement provides a starting point. You may need to adjust the length of pull slightly based on your personal preference and shooting style.

Adjusting Length of Pull

Once you’ve determined your ideal length of pull, you may need to adjust your firearm to match. There are several ways to do this:

Stock Spacers: Many modern rifles and shotguns come with removable stock spacers. Adding or removing spacers allows you to fine-tune the length of pull.
Adjustable Stocks: Some stocks feature adjustable cheek pieces and length of pull settings, providing a wide range of customization options.
Recoil Pads: Replacing the recoil pad with a thicker or thinner one can also alter the length of pull.
Professional Gunsmithing: For more significant adjustments or for older firearms, it may be necessary to consult a professional gunsmith. They can modify the stock to achieve the desired length of pull.

Common Problems with Incorrect Length of Pull

Shooting with an incorrect length of pull can lead to several problems:

“Thumb to Nose” Effect: A length of pull that is too long can cause the shooter’s thumb to strike their nose during recoil. This is painful and can lead to flinching.
Difficulty Mounting the Firearm: A length of pull that is too short can make it difficult to mount the firearm properly, leading to inconsistent cheek weld and poor accuracy.
Increased Felt Recoil: An improperly fitted stock can increase felt recoil, making the shooting experience unpleasant.
Muscle Strain: Shooting with an incorrect length of pull can strain muscles in the neck, shoulders, and back, leading to fatigue and discomfort.

The Impact of Clothing on Length of Pull

It’s important to consider the impact of clothing on the length of pull. Heavy jackets or bulky clothing can effectively shorten the length of pull, making the firearm feel less comfortable and more difficult to control. When measuring and adjusting your length of pull, wear the type of clothing you typically wear when shooting. This will ensure a more accurate fit.

Advanced Considerations for Length of Pull

Beyond the basics, there are more advanced considerations related to length of pull that experienced shooters may want to explore:

Adjustable Cheek Pieces: These allow for precise alignment of the eye with the sights or scope.
Cast-On and Cast-Off: These refer to the horizontal angle of the stock and can affect how the firearm aligns with the shooter’s eye.
Pitch: This refers to the vertical angle of the butt of the stock and can affect how the firearm recoils.

Conclusion

Measuring and adjusting the length of pull is a crucial step in ensuring a comfortable, accurate, and safe shooting experience. By following the steps outlined in this guide, you can determine your ideal length of pull and make the necessary adjustments to your firearm. Remember to consider factors such as body size, arm length, shooting stance, and clothing when determining your ideal length of pull. A properly fitted firearm will not only improve your shooting performance but also enhance your overall enjoyment of the sport. Taking the time to properly measure and adjust the length of pull is an investment in your shooting success and safety. Don’t underestimate the importance of this often-overlooked aspect of firearm fit. [See also: Choosing the Right Rifle Scope], [See also: Gun Safety Tips for Beginners]