The formula to calculate the Bullet Spin Rate (BSP) is:
\[ BSP = \frac{MV \times 720}{BTR} \]
Where:
The Bullet Spin Rate (BSP) is a measure of how fast a bullet spins as it travels through the air. It is calculated by dividing 720 by the barrel twist rate and then multiplying by the muzzle velocity. This rate is crucial for understanding the stability and accuracy of the bullet in flight.
Example 1:
Calculation:
\[ BSP = \frac{3000 \times 720}{10} = 216000 \text{ RPM} \]
Example 2:
Calculation:
\[ BSP = \frac{2500 \times 720}{12} = 150000 \text{ RPM} \]
