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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Barrel makers/rifle makers true barrel twist rate
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<blockquote data-quote="JAYgs8163" data-source="post: 2704789" data-attributes="member: 37460"><p>My guess is your process for checking twist rate is flawed since all three rifles you checked are off. Try this.</p><p></p><p>Make sure you wrap a patch around your brush/jag creating a firm fit in the barrel and you've moved the brush/jag about 3" into the rifling of the barrel, now mark your cleaning rod with a sharpie at the exact edge of where it's aligned with your bore guide. Now you need to mark with a Sharpie a index reference point also on the rod so you can see when the rod has made a complete revolution/twist. When you've reached that point of a complete revolution/twist stop and mark the rod again at the exact edge of where it's aligned with your bore guide. Remove the rod and measure between those 2 marks. This will give you a pretty exacting twist rate measurement. Being off a 1/16 of an inch or 1/8th of an inch on the revolution of the rod can equal a 1/2"-1" in your measurement of twist rate.</p></blockquote><p></p>
[QUOTE="JAYgs8163, post: 2704789, member: 37460"] My guess is your process for checking twist rate is flawed since all three rifles you checked are off. Try this. Make sure you wrap a patch around your brush/jag creating a firm fit in the barrel and you’ve moved the brush/jag about 3” into the rifling of the barrel, now mark your cleaning rod with a sharpie at the exact edge of where it’s aligned with your bore guide. Now you need to mark with a Sharpie a index reference point also on the rod so you can see when the rod has made a complete revolution/twist. When you’ve reached that point of a complete revolution/twist stop and mark the rod again at the exact edge of where it’s aligned with your bore guide. Remove the rod and measure between those 2 marks. This will give you a pretty exacting twist rate measurement. Being off a 1/16 of an inch or 1/8th of an inch on the revolution of the rod can equal a 1/2”-1” in your measurement of twist rate. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Barrel makers/rifle makers true barrel twist rate
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