i have many many 30 06 springfields and i broke down and ordered set of gauges
now to use the gauges remove fire pin and extractor? and lay gauge in there and work bolt????
someone one walk me through this
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i have many many 30 06 springfields and i broke down and ordered set of gauges
now to use the gauges remove fire pin and extractor? and lay gauge in there and work bolt????
someone one walk me through this
To give an accurate reading, the gauges must not have any pressure from springs, firing pins, etc. one them. I use my gauges on just Garands & 1903s. For a Garand, it is necessary for me to diasassemble the rifle & remove the extractor & ejector from the bolt. Otherwise, they put pressure on the gauges. For the 1903, I just remove the bolt shroud & firing pin; my gauges are cut such that the 1903 extractor does not touch them. In either rifle, use a brush to clean the chamber. Insert a gauge and with just finger pressure, gently push the bolt closed. For a Go gauge, it should close all the way. If it does not, you have a short chambered barrel that needs to be finish reamed. For a No Go gauge, the bolt should stop within 10-30 degrees of rotation before being fully closed. The bolt should not close all the way. On a Garand, this typically means the right lug is about .125" above the receiver. For a 1903, a bit more, perhaps .25". Bear in mind than you can put enough pressure on the bolt to force it close, springing the gauge and possibly damaging or destroying it. Finger pressure is all you need for an accurate reading.
Unless you are mounting and headspacing new barrels, the "Go" and "No Go" will do you little good. Odds are, your 03s will easily close on both gauges. A "Field" gauge will identify a rifle with excessive headspace. Have a fun time, Regards, Clark
I respectfully disagree with half of your statement.:)Quote:
Originally Posted by Clark Howard
I have had several old used milsurp rifles that would not close on the go gauge,and with perfectly clean chambers. Granted,it's not common,but I have had it happen enough that it is a check I make all the time when evaluating a used rifle. You have no way of knowing if someone may have swapped out a bolt and maybe the headspace is to tight because the barrel was finish reamed using a worn or out of spec bolt.
If checking a rifle for the safety of shooting it,one should use a go gauge to insure the chamber is not to short and then a field gauge to check if its too long/worn. By using a nogo,you could end up finding the bolt will close all the way and then what would you do? It could very well be that it is still safe to shoot but you need the field gauge to verify that. If it still closes on a field gauge then its time to start replacing parts. The nogo is ok and if it does'nt close on it your GTG,but if it does,and it easily could on a well used rifle,then you'll be buying a field gauge anyways. When you do,make sure it is the same brand as the two you just bought. The go and field are the two you should have got for checking used rifles.