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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="Hugnot" data-source="post: 2704710" data-attributes="member: 115658"><p>I once had a PacNor 6.5-06. It should have been a 1-9. It would not shoot pointy 140 BTHP bullets well. Upon dragging a tight-fitting patch back thru the bore and measuring where a full turn occurred, I saw the barrel was almost a 1-10 twist. I believe that when button rifling a barrel, the barrel is rotated while the button is dragged thru the bore and the rotation rate might vary. Some of my button rifled barrels have slightly slower twist rates, like .125 or .25 inches more than marked on the barrel. As mentioned, a hammer forged barrel formed about a mandrel will have no variation.</p></blockquote><p></p>
[QUOTE="Hugnot, post: 2704710, member: 115658"] I once had a PacNor 6.5-06. It should have been a 1-9. It would not shoot pointy 140 BTHP bullets well. Upon dragging a tight-fitting patch back thru the bore and measuring where a full turn occurred, I saw the barrel was almost a 1-10 twist. I believe that when button rifling a barrel, the barrel is rotated while the button is dragged thru the bore and the rotation rate might vary. Some of my button rifled barrels have slightly slower twist rates, like .125 or .25 inches more than marked on the barrel. As mentioned, a hammer forged barrel formed about a mandrel will have no variation. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Barrel makers/rifle makers true barrel twist rate
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