Determining the correct length of pull (LOP) for your firearm is crucial for comfortable and accurate shooting. An improperly fitted LOP can lead to discomfort, poor accuracy, and even injury. But what if you don't have access to your firearm? This guide explains how to measure length of pull accurately without your gun, using readily available tools and techniques.
Understanding Length of Pull
Before we delve into the measurement methods, let's define length of pull. It's the distance from the trigger face to the end of the buttstock. A properly fitted LOP allows you to comfortably mount the firearm, achieve a consistent cheek weld, and maintain proper sight alignment. Getting this right significantly impacts your shooting experience.
Methods for Measuring Length of Pull Without Your Firearm
Several methods allow you to determine your ideal LOP without needing your gun physically present. These methods rely on measuring your body and applying established guidelines.
Method 1: Using Body Measurements and a Ruler
This method uses simple body measurements to estimate your ideal LOP. It's not as precise as directly measuring your gun, but it provides a good starting point.
-
Measure your shoulder-to-eye distance: This is the distance from the center of your shoulder to the center of your eye. Use a measuring tape and hold it straight to get an accurate reading.
-
Measure your wingspan: Extend your arms out to the sides. Have someone measure the distance from the tip of your right middle finger to the tip of your left middle finger.
-
Calculate estimated LOP: There isn't a universally agreed-upon formula, but a common estimation involves using roughly 1/3 of your wingspan or about 85-90% of your shoulder-to-eye distance. Consult various firearm-related websites and resources to find more precise formulas or charts correlating these measurements to LOP.
-
Consider your shooting posture: Your shooting posture (standing, sitting, prone) also affects the ideal LOP. Standing generally requires a slightly longer LOP compared to sitting.
Important Note: This method provides an approximation. Individual body proportions vary, and this approach may not be perfectly accurate for everyone.
Method 2: Using a Substitute and a Ruler
If you have a similarly shaped object to your firearm’s stock, you can use that as a substitute to help estimate your LOP.
-
Find a suitable substitute: Look for an object with a similar shape and angle to your gun's stock. A sturdy piece of wood, a rolled-up towel, or even a book can work, depending on the stock's shape and dimensions.
-
Simulate the shooting position: Assume your natural shooting stance and position the substitute against your shoulder, mimicking how your gun would fit.
-
Measure the distance: Use a ruler or measuring tape to measure the distance from the end of the substitute (simulating the butt of your stock) to a point representing your trigger finger. This point should align with your trigger finger's position in a natural shooting grip.
This method provides a better estimate than Method 1 as it considers your body's interaction with the stock's shape. However, the accuracy still depends on the quality of your substitute.
Method 3: Consulting Existing Gun Data (If Applicable)
If you already own a firearm with a comfortable LOP, check the manufacturer's specifications or the gun itself for the exact LOP measurement. Use this as a baseline for future firearm purchases. Many online retailers and manufacturers provide detailed specifications for their products, including the LOP.
Factors to Consider Beyond LOP
While LOP is vital, remember that other factors contribute to a comfortable and accurate shooting experience. These include:
- Drop at Comb: The vertical distance between the comb (the highest point of the stock) and the receiver.
- Cast: The horizontal offset of the comb, affecting cheek weld.
- Stock Shape and Material: The shape and material of the stock impact ergonomics and comfort.
Understanding these elements, in addition to LOP, ensures a perfect fit for your shooting style and physique.
Conclusion: Getting the Right LOP
Determining the ideal LOP without your firearm involves a degree of estimation. While the methods described here offer valuable guidance, the most accurate approach involves directly measuring your firearm. However, these methods can be helpful when planning a firearm purchase or adjusting your existing gun's stock. Always prioritize safety and comfort when handling firearms and consider seeking professional advice from a gunsmith or experienced shooter if you have any uncertainties.
