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Rifles, Reloading, Optics, Equipment
Gunsmithing
DIY pillar bedding?
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<blockquote data-quote="NesikaChad" data-source="post: 257780" data-attributes="member: 7449"><p>Not true.</p><p></p><p>Before I answer it, lets look at what is really going on.</p><p></p><p>You have a pair of screws holding the action in the stock (in some cases you have as many as four). In most cases it's also holding a hinged floor metal or at least a trigger guard. </p><p></p><p>If it's a Remington its a 1/4-28 thread pitch. If you sit and take the time to do the math to calculate the compressive/tensile loads generated, its quite remarkable. Its over a thousand lbs when torqued to around 40inch lbs.</p><p></p><p>A stock (wood especially) is only going to tolerate that kind of tensile load for so long. It'll eventually yield and this will result in compressed fibers. Now the stock is a sponge and the screw that was tight today isn't as tight tomorrow or the day after. Now your chasing your rifle with a torque wrench instead of enjoying it cause shot groups are wandering around the paper like Bedouin tribesman.</p><p></p><p>A pillar (properly installed) resolves this issue when used in conjunction with a good bedding job. Just the same as pillars (footers) support the load on a concrete slab that a house is built upon.</p><p></p><p>Also, FWIW a properly pillar bedded rifle will result in the screw only touching the floor metal and the threads in the receiver. At no time should it contact the pillar/stock as this will end up being a secondary recoil lug. That's bad for accuracy.</p></blockquote><p></p>
[QUOTE="NesikaChad, post: 257780, member: 7449"] Not true. Before I answer it, lets look at what is really going on. You have a pair of screws holding the action in the stock (in some cases you have as many as four). In most cases it's also holding a hinged floor metal or at least a trigger guard. If it's a Remington its a 1/4-28 thread pitch. If you sit and take the time to do the math to calculate the compressive/tensile loads generated, its quite remarkable. Its over a thousand lbs when torqued to around 40inch lbs. A stock (wood especially) is only going to tolerate that kind of tensile load for so long. It'll eventually yield and this will result in compressed fibers. Now the stock is a sponge and the screw that was tight today isn't as tight tomorrow or the day after. Now your chasing your rifle with a torque wrench instead of enjoying it cause shot groups are wandering around the paper like Bedouin tribesman. A pillar (properly installed) resolves this issue when used in conjunction with a good bedding job. Just the same as pillars (footers) support the load on a concrete slab that a house is built upon. Also, FWIW a properly pillar bedded rifle will result in the screw only touching the floor metal and the threads in the receiver. At no time should it contact the pillar/stock as this will end up being a secondary recoil lug. That's bad for accuracy. [/QUOTE]
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DIY pillar bedding?
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