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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
6.5x284 Norma Build Barrel Twist?!
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<blockquote data-quote="sable tireur" data-source="post: 1444195" data-attributes="member: 27307"><p>Here is a little something more for your consideration.</p><p></p><p>I took my information and plugged it into the Berger Stability calculator just for grins. I don't always hold by what this piece of math generates but I can report the following:</p><p></p><p>The 155 in the 6.5x284 Norma running at 2,900 fps at the muzzle will be just slightly less than optimum stability at sea level. But move up to the 3,500 ft elevation you mention and it becomes 'very stable'. This is with the 1:8" twist rate. To gain optimum at sea level the calculator suggests a 1:7.75" twist rate </p><p></p><p>The 6.5x284 should not be saddled with any complaints about being a 'barrel burner'. Poor powder choice, too long of a shot string, poor cleaning habits, etc. all contribute to a belittling of the cartridge. Choose a cool burning powder without sacrificing velocity and you get longer barrel life. Barrels are an expendable commodity whether you choose to acknowledge it or not. Shoot them and enjoy all the experiences or put it away in the safe and enjoy the longer barrel life...</p><p></p><p>Regards.</p></blockquote><p></p>
[QUOTE="sable tireur, post: 1444195, member: 27307"] Here is a little something more for your consideration. I took my information and plugged it into the Berger Stability calculator just for grins. I don't always hold by what this piece of math generates but I can report the following: The 155 in the 6.5x284 Norma running at 2,900 fps at the muzzle will be just slightly less than optimum stability at sea level. But move up to the 3,500 ft elevation you mention and it becomes 'very stable'. This is with the 1:8" twist rate. To gain optimum at sea level the calculator suggests a 1:7.75" twist rate The 6.5x284 should not be saddled with any complaints about being a 'barrel burner'. Poor powder choice, too long of a shot string, poor cleaning habits, etc. all contribute to a belittling of the cartridge. Choose a cool burning powder without sacrificing velocity and you get longer barrel life. Barrels are an expendable commodity whether you choose to acknowledge it or not. Shoot them and enjoy all the experiences or put it away in the safe and enjoy the longer barrel life... Regards. [/QUOTE]
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6.5x284 Norma Build Barrel Twist?!
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