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Rifles, Reloading, Optics, Equipment
Gunsmithing
Lug setback? What am I missing?
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<blockquote data-quote="codyadams" data-source="post: 1820432" data-attributes="member: 87243"><p>As far as showing pressure signs, that goes for ANY tough brass, not just lapua bolt face sized cartridges. Lapua, Peterson, Alpha, ADG, and so on, the tougher brass doesn't shot pressure signs until higher pressure as others, in general. For example - </p><p></p><p>Winchester .308 brass will generally show pressure signs, such as ejector mark, bolt lift, primer pocket stretch, ect. at a lower pressure (and usually velocity) than Lapua .308 brass will, due to softer brass. This doesn't mean both loads are at 64,000 psi, and the Lapua brass makes it go faster because it says Lapua and it cost more, it is because the Lapua brass is still functional and doesn't have the detrimental pressure signs such as ejector marks, heavy bolt lift, and primer pocket expansion that would be present on the same pressure load in the Winchester brass. The threshold for Winchester brass, for example, may be 62,000 psi before pressure signs appear, where as with the Lapua brass, you will be at say 69,000 psi before the same pressure signs appear. That is the Benefit of tougher brass, aside from better consistency, is being able to load higher pressure without the signs, or having it last much longer at standard pressure loads.</p></blockquote><p></p>
[QUOTE="codyadams, post: 1820432, member: 87243"] As far as showing pressure signs, that goes for ANY tough brass, not just lapua bolt face sized cartridges. Lapua, Peterson, Alpha, ADG, and so on, the tougher brass doesn't shot pressure signs until higher pressure as others, in general. For example - Winchester .308 brass will generally show pressure signs, such as ejector mark, bolt lift, primer pocket stretch, ect. at a lower pressure (and usually velocity) than Lapua .308 brass will, due to softer brass. This doesn't mean both loads are at 64,000 psi, and the Lapua brass makes it go faster because it says Lapua and it cost more, it is because the Lapua brass is still functional and doesn't have the detrimental pressure signs such as ejector marks, heavy bolt lift, and primer pocket expansion that would be present on the same pressure load in the Winchester brass. The threshold for Winchester brass, for example, may be 62,000 psi before pressure signs appear, where as with the Lapua brass, you will be at say 69,000 psi before the same pressure signs appear. That is the Benefit of tougher brass, aside from better consistency, is being able to load higher pressure without the signs, or having it last much longer at standard pressure loads. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
Lug setback? What am I missing?
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