|
||||||||||||||||||||||||||||||||||||||
Could someone educate those of us who are lacking knowledge, on this whole HS issue? I mean, is it necessary, or is it standard practice to match a bbl up with a matching bolt when building a custom AR?
I mean, WHEN LMT, COLT, etc, are building rifles/carbines, they just grab a bolt off the assembly line, and chunk it in the next gun (bbl) that comes down the line, right?
I am just trying to figure out when HS is an issue, and when checking HS or matching up bolts with bbls is necessary??
Paul,
When LMT, Colt etc...are slapping guns together yes you are probably right. However, all the guns are inspected to include headspace checks before they are shipped out. Since the relaible manufacturers keep their weapons within tolerances and all the parts are new there shouldn't be an issue with it not headspacing correctly.
I gotcha. You see where I'm going with this?
Basically, what I'm trying to determine, is IF I am buying uppers, lowers, and bcg's from various sources, then do I need to be checking HS on all my builds??
OR, do I just need to go shooting, and call it good if the weapon performs reliably.???
Thanks.
The latter. The only time I might check is if I replace a bolt that was shot in a barrel that had a lot of wear. Bore/chamber wear has nothing to do with it though, it would the wear on the barrel extension. And even then I'd probably just slap a new bolt in and declare it GTG. If you ran into a situation where you had a new bolt that would close on a Field Reject gauge, there's no way really to adjust things other than try different bolts, with the hope you'd get one that reduced headspace back within the Go/No Go area.
I'm pretty sure the Kotonics Improved chamber doesn't alter HS, it only affectes the leade and freebore areas. HS guages aren't designed to extend into this area.
What your Manson instructions refer to is using these in Ackley (or similar) chambers where the shoulder angle is changed. Again, I'm pretty sure the 6.8 improved retains the same shoulder angle and shoulder position so SAAMI HS gauges will work perfectly.
Bookmarks