Same, Metford is the radius ed type of polygonal rifling.
Here is an interesting article on the Newton-Pope Rifling which is a form of polygonal or oval rifling similar to the Metford.http://ps-2.kev009.com/ohlandl/Cast_Bullet/Vault/Newton-Pope_Rifling_Oval_Bore.html
Last edited by Tejano; 09/23/19.
"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli
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