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Rifles, Reloading, Optics, Equipment
Gunsmithing
Remage Question
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<blockquote data-quote="tobnpr" data-source="post: 1877806" data-attributes="member: 68758"><p>Depends, right?</p><p>If the threads only need two thou to clean up concentric, that little extra play is inconsequential. Receiver/barrel mating threads do not need to be class 3 fit tolerance. Threads bring the parts together- it's the shoulders that align the parts and it's critical the the shoulders be perfect- not the threads. Replace barrel "shoulder" with trued "nut" for a prefit. Most smiths will just cut ten thou over which covers worst case scenarios, and there are prefits available at ten thou over to fit. "Sort of" standardization... If receiver is cut ten over, factory thread pitch barrels will have too much play to be used.</p><p></p><p>You said hunting rifle...so in this application, fuhgeddaboutit. What little bit is gained from truing receiver threads isn't going to justify the cost, nor improve accuracy enough to be justified. True the receiver face, lap in the lugs (if the lugs are waaay off, I would square the receiver abutments and skim cut the back of the lugs). Spending coin on the barrel itself is where you want to go... You'll get far more return at the target spending $$ on the barrel itself rather than trying to tweak the action.</p><p></p><p>Not clear on the other question about shouldered barrels, but shouldered barrels are no more difficult to switchbarrel than a nutted one, but your vise does need to be able to secure the barrel with the the additional torque needed.</p><p>Just torque to line up the witness marks, headspace will be 100% repeatable.</p></blockquote><p></p>
[QUOTE="tobnpr, post: 1877806, member: 68758"] Depends, right? If the threads only need two thou to clean up concentric, that little extra play is inconsequential. Receiver/barrel mating threads do not need to be class 3 fit tolerance. Threads bring the parts together- it's the shoulders that align the parts and it's critical the the shoulders be perfect- not the threads. Replace barrel "shoulder" with trued "nut" for a prefit. Most smiths will just cut ten thou over which covers worst case scenarios, and there are prefits available at ten thou over to fit. "Sort of" standardization... If receiver is cut ten over, factory thread pitch barrels will have too much play to be used. You said hunting rifle...so in this application, fuhgeddaboutit. What little bit is gained from truing receiver threads isn't going to justify the cost, nor improve accuracy enough to be justified. True the receiver face, lap in the lugs (if the lugs are waaay off, I would square the receiver abutments and skim cut the back of the lugs). Spending coin on the barrel itself is where you want to go... You'll get far more return at the target spending $$ on the barrel itself rather than trying to tweak the action. Not clear on the other question about shouldered barrels, but shouldered barrels are no more difficult to switchbarrel than a nutted one, but your vise does need to be able to secure the barrel with the the additional torque needed. Just torque to line up the witness marks, headspace will be 100% repeatable. [/QUOTE]
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