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Rifles, Reloading, Optics, Equipment
Reloading
More reloading issues
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<blockquote data-quote="SidecarFlip" data-source="post: 648189" data-attributes="member: 39764"><p>...thats overkill. </p><p> </p><p>Of course minimum acceptable engagement also necessitates proper torque values.....</p><p> </p><p>To cut hairs, it all depends on thread pitch and diameter as well as class of thread fit of the fastener itself plus the material makeup. For example aluminum interlocked by thread assemblies take more engagement than stainless to alloy steel or steel to steel....</p><p> </p><p>In the case of the receiver and rail with (we presume) alloy fasteners engaging the steel receiver and multiple fastemers on the rail to receiver joint (in this case 3), one full thread of engagement should be sufficient at 3 fastening points. Without measuring the wall thickness of the receiver (beacuse I don't have the gun handy and my tools are in the shop and it's locked up right now, I don't believe you can get over 2 complete revolutions of the rail screws without them being proud of the id of the receiver bore anyway.</p><p> </p><p>This isn't a 50MM howitzer, it's a 338. I realize it recoils and Newton's Law always prevails but the recoil inertia is less than 2 pounds with the most heavy optic you can buy unless you stick a BORS unit on a Mark4 on the rail which is not likely.... ..... Not a lot and in reality the firearm recoils like a powcer puff, I know, I have one too. My 410 scattergun recoils harder.....</p><p> </p><p>...actually something I found amazing. First time I touched it off, I was expecting to get sucker punched and it never happened. I actually fired mine from my hip in a quick pull up shot.... I missed but had no problem keeping my hands on the rifle or my balance and I'm a little person.</p><p> </p><p>I could, I guess, trundle off to the shop and grab one of my tome's that explains in detail about thread engagement in relationship to pitch versus diameter versus material and classes of thread fit but it's late and frankly, I've had a long day.</p><p> </p><p>For this particular application, I'll just stick with one full turn in full engagement for all three fasteners on the rail with threadlocker and properly and evenly torqued at no more than 40 inch pounds.</p></blockquote><p></p>
[QUOTE="SidecarFlip, post: 648189, member: 39764"] ...thats overkill. Of course minimum acceptable engagement also necessitates proper torque values..... To cut hairs, it all depends on thread pitch and diameter as well as class of thread fit of the fastener itself plus the material makeup. For example aluminum interlocked by thread assemblies take more engagement than stainless to alloy steel or steel to steel.... In the case of the receiver and rail with (we presume) alloy fasteners engaging the steel receiver and multiple fastemers on the rail to receiver joint (in this case 3), one full thread of engagement should be sufficient at 3 fastening points. Without measuring the wall thickness of the receiver (beacuse I don't have the gun handy and my tools are in the shop and it's locked up right now, I don't believe you can get over 2 complete revolutions of the rail screws without them being proud of the id of the receiver bore anyway. This isn't a 50MM howitzer, it's a 338. I realize it recoils and Newton's Law always prevails but the recoil inertia is less than 2 pounds with the most heavy optic you can buy unless you stick a BORS unit on a Mark4 on the rail which is not likely.... ..... Not a lot and in reality the firearm recoils like a powcer puff, I know, I have one too. My 410 scattergun recoils harder..... ...actually something I found amazing. First time I touched it off, I was expecting to get sucker punched and it never happened. I actually fired mine from my hip in a quick pull up shot.... I missed but had no problem keeping my hands on the rifle or my balance and I'm a little person. I could, I guess, trundle off to the shop and grab one of my tome's that explains in detail about thread engagement in relationship to pitch versus diameter versus material and classes of thread fit but it's late and frankly, I've had a long day. For this particular application, I'll just stick with one full turn in full engagement for all three fasteners on the rail with threadlocker and properly and evenly torqued at no more than 40 inch pounds. [/QUOTE]
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