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But you would have to measure the bullet and plug the bullet length into the barrel twist formula:

Bullet length in calibers multiplied by twist rate in calibers equals a constant, 150. ( This is the Greenhill formula.)

Measure the length of the bullet in inches. Divide this length by 0.257.

150 divided by the bullet length in calibers equals the twist rate in calibers.

Mulitiply the twist rate in calibers by .257 and you will have the rate of twist in inches for your barrel in order to stabilize the bullet.

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