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Rifles, Reloading, Optics, Equipment
Gunsmithing
First Custom bolt gun
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<blockquote data-quote="ntsqd" data-source="post: 2375421" data-attributes="member: 93138"><p>Maybe I misunderstand the term, but to me a "pre-fit" barrel means a shouldered barrel that is precision machined with a finished chamber intended to Head-Space correctly the first time it is screwed into place. It is Pre-Fit to the action in question by any one of several methods and will head-space correctly if torqued to the gunsmith's spec. Not that any responsible person wouldn't check it anyway, but in theory and in practice the head-space shouldn't need to be checked. </p><p>It does not mean a barrel-nut barrel with a finished chamber.</p><p></p><p>I don't think that it's possible to overkill a home made action/barrel vise. I'd want at least 5/8" studs and would prefer 3/4" Most commercial vises appear to use UNC threads, but I'd use UNF threads.</p><p></p><p>I check my barrel nut builds with GO and NO-GO gauges first, then check function with a loaded round or one of my bullet seating depth dummys if I have one. The comment about using a stripped bolt kinda got buried, but it is important. No firing pin assembly or spring-loaded ejector should be in place while checking this.</p></blockquote><p></p>
[QUOTE="ntsqd, post: 2375421, member: 93138"] Maybe I misunderstand the term, but to me a "pre-fit" barrel means a shouldered barrel that is precision machined with a finished chamber intended to Head-Space correctly the first time it is screwed into place. It is Pre-Fit to the action in question by any one of several methods and will head-space correctly if torqued to the gunsmith's spec. Not that any responsible person wouldn't check it anyway, but in theory and in practice the head-space shouldn't need to be checked. It does not mean a barrel-nut barrel with a finished chamber. I don't think that it's possible to overkill a home made action/barrel vise. I'd want at least 5/8" studs and would prefer 3/4" Most commercial vises appear to use UNC threads, but I'd use UNF threads. I check my barrel nut builds with GO and NO-GO gauges first, then check function with a loaded round or one of my bullet seating depth dummys if I have one. The comment about using a stripped bolt kinda got buried, but it is important. No firing pin assembly or spring-loaded ejector should be in place while checking this. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
First Custom bolt gun
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