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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Sig wins contract with the 277 fury
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<blockquote data-quote="Milepost" data-source="post: 1916248" data-attributes="member: 104022"><p>Although I agree with the notion of faster twists lead to better stabilization. It is the caliber diameter and bearing surface length of the bullet as well as the muzzle velocity that dictates the correct twist rate. </p><p> The construction of the bullet can also often dictate the max spin rate. Lead core bullets will blow up after exiting the barrel if the spin rate is too high. Accuracy is nil if the bullet never reaches the target. Copper or brass bullets can handle the centrifuged loads better But most hunting loads have a lead core design. One has to keep this in mind. Are we talking hunting or competition shooting? What class of bullet are we using? Is it for long range big game hunting or shooting varmints?</p><p> I'm also seeing it mentioned that Sig is using a 7 twist and would really like to know from where that info came from? From what I understand Sig will be using a 8.5 twist for the 277 Fury in theIr Cross rifle. Now if we are talking about shooting the 170 Berger then I would agree the 7 twist would be the optimum choice. The 8.5 twist should work great for the 150 grain bullets on down.</p></blockquote><p></p>
[QUOTE="Milepost, post: 1916248, member: 104022"] Although I agree with the notion of faster twists lead to better stabilization. It is the caliber diameter and bearing surface length of the bullet as well as the muzzle velocity that dictates the correct twist rate. The construction of the bullet can also often dictate the max spin rate. Lead core bullets will blow up after exiting the barrel if the spin rate is too high. Accuracy is nil if the bullet never reaches the target. Copper or brass bullets can handle the centrifuged loads better But most hunting loads have a lead core design. One has to keep this in mind. Are we talking hunting or competition shooting? What class of bullet are we using? Is it for long range big game hunting or shooting varmints? I’m also seeing it mentioned that Sig is using a 7 twist and would really like to know from where that info came from? From what I understand Sig will be using a 8.5 twist for the 277 Fury in theIr Cross rifle. Now if we are talking about shooting the 170 Berger then I would agree the 7 twist would be the optimum choice. The 8.5 twist should work great for the 150 grain bullets on down. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Sig wins contract with the 277 fury
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