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Rifles, Reloading, Optics, Equipment
Gunsmithing
Bolt Diameters
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<blockquote data-quote="J E Custom" data-source="post: 1191924" data-attributes="member: 2736"><p>I was going to try and give an explanation for the problem, but after seeing this I am not sure that I can stop laughing long enough to type.</p><p></p><p>Ok after several tries I will begin.</p><p></p><p>In order to change the OD or ID of the action enough to cause the bolt to seize or tighten, the action would have to be heated hot enough that it would be very uncomfortable to touch. "BUT"with</p><p>a long cylindrical shape with large openings on one side and the bottom, the receiver could certainly move out of straight/true buy a few thousandths causing the binding. It would only have to move a few thousandths to bind if the receiver was extremely close to the same as the bolt.</p><p></p><p>With the large openings, one side of the receiver the solid side is much stronger than the side with the two large cutouts and any expansion would not be constant throughout the entire length. (Causing the action to warp toward the weaker side). This effect is the reason that most bench rest actions have a solid bottom (No magazine cutout). </p><p></p><p>Heating/cooling causes all things to expand or contract but this can be dealt with, with the proper clearance. In my opinion the problem is the shift of the action straightness over its length, not its girth.(Example; A uneven growth of .0005 per inch, would throw the action out of straight on a 7 or 8" action by .0035 to .004) there went the clearance if you started with .002 thousandths.</p><p></p><p>I hope my spelling and typing is not to bad. I am still laughing.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1191924, member: 2736"] I was going to try and give an explanation for the problem, but after seeing this I am not sure that I can stop laughing long enough to type. Ok after several tries I will begin. In order to change the OD or ID of the action enough to cause the bolt to seize or tighten, the action would have to be heated hot enough that it would be very uncomfortable to touch. "BUT"with a long cylindrical shape with large openings on one side and the bottom, the receiver could certainly move out of straight/true buy a few thousandths causing the binding. It would only have to move a few thousandths to bind if the receiver was extremely close to the same as the bolt. With the large openings, one side of the receiver the solid side is much stronger than the side with the two large cutouts and any expansion would not be constant throughout the entire length. (Causing the action to warp toward the weaker side). This effect is the reason that most bench rest actions have a solid bottom (No magazine cutout). Heating/cooling causes all things to expand or contract but this can be dealt with, with the proper clearance. In my opinion the problem is the shift of the action straightness over its length, not its girth.(Example; A uneven growth of .0005 per inch, would throw the action out of straight on a 7 or 8" action by .0035 to .004) there went the clearance if you started with .002 thousandths. I hope my spelling and typing is not to bad. I am still laughing. J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Bolt Diameters
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