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Rifles, Reloading, Optics, Equipment
Gunsmithing
Lug setback? What am I missing?
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<blockquote data-quote="villagelightsmith" data-source="post: 1821320" data-attributes="member: 68421"><p>So, we are talking about PSI, Pounds per Square Inch. Or better expressed as Pounds/Square Inch or P/Si.</p><p>The P remains the same, it's the Square Inches (Area or Square Inches) that are increased by the larger bolt face. Got it. Total pressure on the bolt face is dependant on the size of the bolt face. More surface area, more pressure.</p><p>So with more pressure against the face, the bolt lugs have to hold against the net pressure.</p><p>And one cannot really tell by normal means if the bolt has ever been over-ressured to the point of near failure.</p><p>Nor can one determine the true strength of a factory bolt without testing to destruction.</p><p>It becomes a matter of trust; you buy 'em and try 'em.</p></blockquote><p></p>
[QUOTE="villagelightsmith, post: 1821320, member: 68421"] So, we are talking about PSI, Pounds per Square Inch. Or better expressed as Pounds/Square Inch or P/Si. The P remains the same, it's the Square Inches (Area or Square Inches) that are increased by the larger bolt face. Got it. Total pressure on the bolt face is dependant on the size of the bolt face. More surface area, more pressure. So with more pressure against the face, the bolt lugs have to hold against the net pressure. And one cannot really tell by normal means if the bolt has ever been over-ressured to the point of near failure. Nor can one determine the true strength of a factory bolt without testing to destruction. It becomes a matter of trust; you buy 'em and try 'em. [/QUOTE]
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Lug setback? What am I missing?
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