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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
bullet destabilization
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<blockquote data-quote="Screwey1" data-source="post: 953836" data-attributes="member: 74741"><p>I'll try to answer as many questions as I can remember.</p><p>Yes, Barnes bullet, length of 1.345 velocity spread average 18fps. tangent ogive. I am confident , in my case , that the BC is accurate as advertised (.463). when punched into ballistics calculator , I get accurate shooting solutions out to 850 in different temps at different altitudes on different days. Altitude spread has been over a 5000 ft difference. What happens to BC after 850, I have no idea.</p><p>Barnes gives no minimum twist rate requirements for this bullet. Maybe a call to manufacturer is in order.</p><p> Does anyone know common twist rate for a 270wsm? The logic I have heard on that so far is the easiest to wrap my mind around at this point. However, when I hear that someone is pushing a 175 gr bullet from the same twist rate, it confuses me yet again. I was under the impression that heavier bullets require a tighter twist.</p></blockquote><p></p>
[QUOTE="Screwey1, post: 953836, member: 74741"] I'll try to answer as many questions as I can remember. Yes, Barnes bullet, length of 1.345 velocity spread average 18fps. tangent ogive. I am confident , in my case , that the BC is accurate as advertised (.463). when punched into ballistics calculator , I get accurate shooting solutions out to 850 in different temps at different altitudes on different days. Altitude spread has been over a 5000 ft difference. What happens to BC after 850, I have no idea. Barnes gives no minimum twist rate requirements for this bullet. Maybe a call to manufacturer is in order. Does anyone know common twist rate for a 270wsm? The logic I have heard on that so far is the easiest to wrap my mind around at this point. However, when I hear that someone is pushing a 175 gr bullet from the same twist rate, it confuses me yet again. I was under the impression that heavier bullets require a tighter twist. [/QUOTE]
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Rifles, Bullets, Barrels & Ballistics
bullet destabilization
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