Back on subject Frank have been fitting a ordered with slightly tighter bore for a customer
it is 4R instead of 5R any reason to go to 4 lands?
Types of rifling and the effects on the projectile
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David B
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Re: Types of rifling and the effects on the projectile
Last edited by David B on Fri Feb 17, 2017 8:11 pm, edited 1 time in total.
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