The length of pull refers to the distance from the trigger to the back of a rifle or shotgun’s buttstock. This measurement directly affects the shooter’s comfort, control, and accuracy. A firearm that is too short or too long can cause strain, poor posture, or inconsistent shooting. The Length of Pull Calculator allows users to estimate the optimal measurement based on body height or arm length. By standardizing the measurement process, the calculator ensures that firearms fit the shooter’s physique, resulting in improved ergonomics and overall performance.
How the Calculator Works
The Length of Pull Calculator operates by correlating a shooter’s height with the optimal stock measurement. Users input their height in inches or centimeters, and the tool applies a standardized formula to determine the LOP. The calculator considers human biomechanics, including arm reach and shoulder placement, to generate accurate results. Additionally, some calculators allow adjustment for shooting style, such as prone, standing, or tactical positions. The output guides stock customization or selection, ensuring the firearm fits the shooter’s body perfectly, enhancing control, accuracy, and comfort during extended use.
Formula with Variables Description
The standard formula used in the calculator is:
LOP (inches) = 13 + (Height in inches – 68) / 2
- LOP (inches): Length of pull measurement for the firearm
- Height in inches: Shooter’s total height in inches
- 13: Base LOP for an average adult (68 inches tall)
- 68: Reference height for average adult male
- /2: Factor to scale LOP proportionally with height
General Reference Table
| Shooter Height (inches) | Suggested LOP (inches) | Shooter Height (cm) | Suggested LOP (cm) |
|---|---|---|---|
| 60 | 10 | 152 | 25.4 |
| 64 | 11 | 163 | 27.9 |
| 68 | 13 | 173 | 33.0 |
| 72 | 15 | 183 | 38.1 |
| 76 | 17 | 193 | 43.2 |
This table helps shooters quickly reference ideal LOP without performing calculations.
Example
A shooter with a height of 70 inches wants to determine the optimal LOP. Using the formula:
LOP = 13 + (70 – 68) / 2
LOP = 13 + 2 / 2
LOP = 13 + 1 = 14 inches
Thus, the recommended stock length is 14 inches for maximum comfort and control.
Applications
The Length of Pull Calculator has multiple practical applications across shooting disciplines.
Hunting
Hunters can use the calculator to adjust rifles and shotguns for different hunting scenarios. A proper LOP ensures comfort during long periods in the field and helps maintain shooting accuracy when tracking game.
Competitive Shooting
In competitive shooting, precision is critical. The calculator allows shooters to optimize firearm ergonomics, resulting in faster target acquisition, improved posture, and enhanced performance in timed or precision events.
Firearm Customization
Gunsmiths and firearm enthusiasts use LOP calculations to customize stocks, add spacers, or select pre-fitted firearms. A precise fit reduces recoil impact and increases safety during extended practice sessions or tactical operations.
Most Common FAQs
The LOP ensures proper ergonomics, allowing shooters to maintain correct posture, reduce strain, and enhance shooting accuracy. Firearms with an improper LOP can cause discomfort, inconsistent shots, and even potential injury, making it a critical consideration for all shooters.
Yes, the calculator can be adapted for shorter heights by adjusting the formula inputs. It helps guide firearm selection for youth shooters or adults with smaller frames, ensuring safe and comfortable handling.
Absolutely. A firearm with a proper LOP distributes recoil effectively across the shoulder, minimizing kickback and improving control. This leads to better accuracy and reduces fatigue during extended shooting sessions.