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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Winchester 1885 220 swift
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<blockquote data-quote="shortgrass" data-source="post: 1466805" data-attributes="member: 24284"><p>Easy enough to find out. Take your cleaning rod and jag, with a tight fitting patch and ease it into the rifling . Choose a place on the cleaning rod and make a reference mark. 12" back from that mark, make another, and then again at 14". Make the all the marks on top of the cleaning rod. I put masking tape on the rod to make the marks easy to see and use a Sharpie. Advance the rod with the tight fitting patch into the bore watching the marks you made. Has the rod made a full rotation at 12"? At 14"? Just make sure the patch you choose isn't too tight to pass through the bore and that the handle on the rod has good bearings so the rod rotates with the rifling. When you can't seem to find written information about twist rate, this is how many find out!</p></blockquote><p></p>
[QUOTE="shortgrass, post: 1466805, member: 24284"] Easy enough to find out. Take your cleaning rod and jag, with a tight fitting patch and ease it into the rifling . Choose a place on the cleaning rod and make a reference mark. 12" back from that mark, make another, and then again at 14". Make the all the marks on top of the cleaning rod. I put masking tape on the rod to make the marks easy to see and use a Sharpie. Advance the rod with the tight fitting patch into the bore watching the marks you made. Has the rod made a full rotation at 12"? At 14"? Just make sure the patch you choose isn't too tight to pass through the bore and that the handle on the rod has good bearings so the rod rotates with the rifling. When you can't seem to find written information about twist rate, this is how many find out! [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Winchester 1885 220 swift
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