Twist Rate Calculator | Accurate Optimization Tool

This tool calculates the ideal twist rate for your bullet based on its length and velocity.

Twist Rate Calculator

The twist rate calculator helps you determine the optimal twist rate for your rifle barrel based on bullet diameter, bullet length, bullet velocity, environmental temperature, and altitude.

How to use:

  • Enter the bullet diameter in inches.
  • Enter the bullet length in inches.
  • Enter the bullet velocity in feet per second.
  • Enter the temperature in Fahrenheit.
  • Enter the altitude in feet.
  • Click ‘Calculate’ to get the optimal twist rate for your rifle barrel.

How it calculates:

The formula used to calculate the twist rate is based on several factors such as bullet diameter, bullet length, bullet velocity, temperature, and altitude. By manipulating these variables, the calculator determines the optimal twist rate in inches per turn.

Limitations:

The calculated twist rate is an approximation. Real-world performance can vary based on the specific bullet and rifle. Factors like humidity and actual vs stated bullet weight can also impact accuracy but are not accounted for in this calculator.

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