Here is how I use them:
For use when shopping it's good if the bolt does no close on a NO-GO gauge and you should not buy if it will close on a FIELD gauge. Of course, the class of rifle discussed here would never be so worn as to close on a FIELD gauge.
Let's face it, we're the 1/2 of 1% here. If Joe Collector is looking for an '03, 1917 or Garand, he may carry a FIELD gauge when appraising if the gun is safe to shoot. That's only if he's a very savvy shopper. Most don't bother.I want to know the length of the chamber from the shoulder to the bolt face in thousandths. If I know the length of the chamber in thousandths I know how long the case should be from the shoulder to the case head.
I am assembling a 338 Edge in a Savage 110 LA reciever. Using a prefit barrel and want to be sure about head space. The rifle is just for satisfying my curiosity about long range (1400 to 2000yds). Less than 80 rounds have been run through this barrel. Upon removing the muzzle brake I could see that the barrel muzzle needed to be refaced/squared. The bore and chamber look great but due to the pressure this cartridge developes I want to be careful.
perry42
A bit tricky but tighten the jam nut trying not to rotate barrel.
Less than 80 rounds have been run through this barrel. Upon removing the muzzle brake I could see that the barrel muzzle needed to be refaced/squared. The bore and chamber look great but due to the pressure this cartridge developes I want to be careful.
How can that happen? I have been told the cleaning rod wares out the muzzle and now you are saying it happens with less than 100 rounds. Again, I saw a picture that proved hot high pressure metal cutting gas escaping the muzzle cut the muzzle" I was told the cleaning rod did all that damage so I made a cleaning system for the barrel JIC; as in just in case the cleaning rod is the problem. Point; there is nothing I can do to prevent gas cutting of the muzzle by gas. And then there are tapered gages for measuring taper, most will measure the taper caused by the cleaning rod others assume the diameter of the barrel is perfect.
F. Guffey
My understanding is that the proper use of GO and NO-GO gauges involves chamber reaming. For use when shopping it's good if the bolt does no close on a NO-GO gauge and you should not buy if it will close on a FIELD gauge. Of course, the class of rifle discussed here would never be so worn as to close on a FIELD gauge.