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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Alamo Precision?
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<blockquote data-quote="APR_Shooter" data-source="post: 1824522" data-attributes="member: 108934"><p>John,</p><p></p><p> I don't know how engineering degrees got brought into the conversation, certainly not by me. I'm not an engineer. That said, we're talking pretty simple physics here and you have me intrigued as to how you are getting around it. Your reference to the sear exerting upwards pressure onto the cocking piece is something we both agree on, correct? If the lug abutments are machined square to the axis of the receiver, and the lugs themselves are machined square to a straight bolt body there should be no issues in regards to the mating surfaces............when all bias is removed(like the upward sear pressure that goes away when you pull the trigger). </p><p></p><p> There is always going to be some misalignment of the lugs when in the cocked position. That amount will vary depending on the amount of clearance spec'd between the bolt and its raceway. Doesn't really matter because the misalignment is gone the instant the trigger is pulled. </p><p></p><p>I assume your method is to "lap" the lugs with the fire control system in place, thus giving you the warm fuzzies that everything is "perfect" by the amount of wear you see on the lug surfaces? If so, how do you address the boltface that was just taken out of alignment by doing that? I mean you can't just throw it in your 4 jaw and re-face it at the angle you just induced. How are you qualifying the surface areas you are "correcting"?</p><p></p><p>If your method is correct, then every custom action manufacturer that builds 2-lug actions is wrong. Unless they have a top lug that is longer than the bottom lug......which I don't see happening.</p></blockquote><p></p>
[QUOTE="APR_Shooter, post: 1824522, member: 108934"] John, I don't know how engineering degrees got brought into the conversation, certainly not by me. I'm not an engineer. That said, we're talking pretty simple physics here and you have me intrigued as to how you are getting around it. Your reference to the sear exerting upwards pressure onto the cocking piece is something we both agree on, correct? If the lug abutments are machined square to the axis of the receiver, and the lugs themselves are machined square to a straight bolt body there should be no issues in regards to the mating surfaces............when all bias is removed(like the upward sear pressure that goes away when you pull the trigger). There is always going to be some misalignment of the lugs when in the cocked position. That amount will vary depending on the amount of clearance spec'd between the bolt and its raceway. Doesn't really matter because the misalignment is gone the instant the trigger is pulled. I assume your method is to "lap" the lugs with the fire control system in place, thus giving you the warm fuzzies that everything is "perfect" by the amount of wear you see on the lug surfaces? If so, how do you address the boltface that was just taken out of alignment by doing that? I mean you can't just throw it in your 4 jaw and re-face it at the angle you just induced. How are you qualifying the surface areas you are "correcting"? If your method is correct, then every custom action manufacturer that builds 2-lug actions is wrong. Unless they have a top lug that is longer than the bottom lug......which I don't see happening. [/QUOTE]
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