Go no-go gauges
- Thread starter TK 1985
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Barrelnut
Well-Known Member
No. And that does not sound very smart as the shoulder length can be all over the place on various brands of beltless brass.
FearNoWind
Well-Known Member
Not only haven't I seen a competent gunsmith do that, but every apprentice machinist I've ever known wouldn't do that. Git-rid-o that guy
It don't get no simpler than that!
shortgrass
Well-Known Member
That's what you get when you deal with self taught, internet trained, wanna-be "gunsmiths".lightbulb
Just want to add that I have seen the tape method/trick on a go gauge though.
shortgrass
Well-Known Member
That's probably OK, as long as the NO-GO is used, too. A GO gauge with tape is NOT a NO-GO gauge. "Shimming" the GO gauge can tell you how close you are to minimum SAAMI headspace (the GO gauge). I use steel shim stock with a dab of light grease on the GO gauge, AND then the NO-GO gauge, too. It's call CYA. Check and double check. Headspacing a barrel involves more than potential accuracy and brass life, safety should always be the main concern. Would a inspector in a machine shop opt to rig a GO gauge, and forgo using the certified NO-GO gauge before delivering to the customer? (who will use his inspector and gauges to varify that the parts he ordered are to spec, before accepting those parts)
shortgrass
Well-Known Member
No more than GO + .002, I like GO + .001 even better! Much depends on the ammo that will be used. If the rifle will be used with off-the-shelf factory ammo, I'll use Go to the middle of the tolerence. .30/06 class has .006" from GO to NO-GO, so I like GO +.003", but no more than that. .308 class has .004" between GO and NO-GO, I like GO + .002 in that. Weatherbys use a 'tighter' tolerence on their belted mags, I use the same as they do. Factory Creedmore ammo made by Hornaday or Win. have both been compatable with minimum headspaced chambers,,,, s far...Handloaded ammo can be made to 'fit' the tight headspaced chamber/barrel, factory made ammo is what it is. Most factory made ammo will fit in a minimum headspaced chamber, but I've met up with a few that won't. If a customer who'll use only factory ammo wants a 'tighter' headspaced chamber, I will accomodate that with the factory ammo on hand that he plans on using.
shortgrass
Well-Known Member
When you take your car or pick-up to the local mechanic to have the brakes fixed you trust him to do the work correctly and to use parts that, when manufactured, were proerly gauged and no 'short-cuts' were involved in the gauging. When you get on that air liner, to go on vacation, you trust that when manufactured or repaired that the components of that air craft were properly gauged, again, without "short-cuts" or 'tricks' in the process.
You might know this guy in the video; check out ~1.44 mark ...
[ame]https://youtu.be/KICBv-0U87Y?t=109[/ame]
