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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
260 to 6.5-284 - is it worth it???
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<blockquote data-quote="Mikecr" data-source="post: 963699" data-attributes="member: 1521"><p>I love Norma brass but it is softer than both Lapua and Winchester and the pockets don't last as long..</p><p><a href="http://bulletin.accurateshooter.com/2011/09/cartridge-brass-alloys-revealed-by-x-ray-spectrometers/" target="_blank">Cartridge Brass Alloys Revealed by X-Ray Spectrometers « Daily Bulletin</a></p><p></p><p>There is pressure and there is pressure 'problems'. Completely different, because pressure is your friend -until it isn't.</p><p></p><p>Improved cases with their low body taper and high shoulder angles remove many pressure problems.</p><p>There is also the ratio of body diameter to cal, to burn more powder INSIDE the chamber rather than adding to bullet mass further down a bore.</p><p>Then you set the right capacity for selected bullets and powder to reach a goal at a stable and rational pressure curve. A long enough barrel to burn more powder inside it, producing lower muzzle pressures.</p><p>Tight coaxial throat, and tight chamber end clearance to reduce SD. Lands you can reach and without seating bearing near donuts.</p><p>Sufficient barrel steel around the chamber area, and tight clearances to reduce brass yielding from the git-go. Bushed firing pin, tight breech clearance, beefy aftermarket action.</p><p></p><p>These are mostly overlooked by the many amateurs building guns today. They think velocity and little else.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 963699, member: 1521"] I love Norma brass but it is softer than both Lapua and Winchester and the pockets don't last as long.. [url=http://bulletin.accurateshooter.com/2011/09/cartridge-brass-alloys-revealed-by-x-ray-spectrometers/]Cartridge Brass Alloys Revealed by X-Ray Spectrometers « Daily Bulletin[/url] There is pressure and there is pressure 'problems'. Completely different, because pressure is your friend -until it isn't. Improved cases with their low body taper and high shoulder angles remove many pressure problems. There is also the ratio of body diameter to cal, to burn more powder INSIDE the chamber rather than adding to bullet mass further down a bore. Then you set the right capacity for selected bullets and powder to reach a goal at a stable and rational pressure curve. A long enough barrel to burn more powder inside it, producing lower muzzle pressures. Tight coaxial throat, and tight chamber end clearance to reduce SD. Lands you can reach and without seating bearing near donuts. Sufficient barrel steel around the chamber area, and tight clearances to reduce brass yielding from the git-go. Bushed firing pin, tight breech clearance, beefy aftermarket action. These are mostly overlooked by the many amateurs building guns today. They think velocity and little else. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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260 to 6.5-284 - is it worth it???
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