Thread: twist rates
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Old June 28, 2000, 07:39 PM   #2
Chad Young
Senior Member
Join Date: September 20, 1999
Location: Gainesville, FL
Posts: 601
Well, this is a gross simplification, but, as a rule, heavier and longer bullets require a faster spin rate to stabilize a lighter, shorter bullet in the same caliber.

For example, when the US army switched from a 55-grain .223 projectile to a 62-grain projectile, they had to change the twist rate from 1 in 12" to 1 in 7".

I am sure others here can tell you certaqin twist rates for other calibers.
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