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Rifles, Reloading, Optics, Equipment
Gunsmithing
?To nut or not to nut?
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<blockquote data-quote="Trickymissfit" data-source="post: 424222" data-attributes="member: 25383"><p>I've long felt the whole concept of using a recoil lug was dated technology, but I did see a couple of interesting things when ran thru a mechanical CAD program that will show stress and flex in micro seconds. The whole action simply flexes all over the place in a twisted fashion that is revelant to the twist in the barrel as well as entry. The faster the twist rate the more induced reaction behind the bolt lugs, and this sorta proves itself out with the 1:17 twist 30 caliber barrels. It showed me that round actions are a major fault factor, and that an octagon shape was far better. But the real solution was an octagon shaped action using a three lugged bolt was the right direction. Then you nitride the outside of the action for a minimum of .040" case using two lugs and three bedding screws pulling the action flat against a steel bedding block. A round entering the barrel with a fast twist will actually push the barrel shoulder off the reciever face, and then spring back (all styles do this)</p><p> </p><p> Still your thoughts are with a custom action, and thread was with factory actions. We should be more worried about the harmonics of the barrel and action than worrying about a shoulder or a nut seating on the shoulder. The harmonics created by the shock wave might want to make a lot of folks put the beloved actions up on the shelf forever. The 22 rim fire guys prove this every weekend, and the groups that Calfee and the boys shoot just leave me dumbfounded everytime I see a target. </p><p>gary</p></blockquote><p></p>
[QUOTE="Trickymissfit, post: 424222, member: 25383"] I've long felt the whole concept of using a recoil lug was dated technology, but I did see a couple of interesting things when ran thru a mechanical CAD program that will show stress and flex in micro seconds. The whole action simply flexes all over the place in a twisted fashion that is revelant to the twist in the barrel as well as entry. The faster the twist rate the more induced reaction behind the bolt lugs, and this sorta proves itself out with the 1:17 twist 30 caliber barrels. It showed me that round actions are a major fault factor, and that an octagon shape was far better. But the real solution was an octagon shaped action using a three lugged bolt was the right direction. Then you nitride the outside of the action for a minimum of .040" case using two lugs and three bedding screws pulling the action flat against a steel bedding block. A round entering the barrel with a fast twist will actually push the barrel shoulder off the reciever face, and then spring back (all styles do this) Still your thoughts are with a custom action, and thread was with factory actions. We should be more worried about the harmonics of the barrel and action than worrying about a shoulder or a nut seating on the shoulder. The harmonics created by the shock wave might want to make a lot of folks put the beloved actions up on the shelf forever. The 22 rim fire guys prove this every weekend, and the groups that Calfee and the boys shoot just leave me dumbfounded everytime I see a target. gary [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
?To nut or not to nut?
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