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Headspaceing Question
Question. Replaced bolt in my 5.340 Inland with a "correct" bolt. When headspacing, Bolt closes on "Go" AND "NoGo" gauges. Bolt DOES NOT close on the "Field" gauge. Checked headspace with three other (SG, U and original Inland) bolts - headspace good (would not close on "NoGo"). I understand that the headspace with the "correct" Inland bolt is OK but only marginally. Since the three other bolts headspaced correctly, does this mean that barrel and receiver (chamber) is OK and that the "correct" Inland bolt is nearing the safety limit? Or, in other words, do I need to worry about a rebarreling issue?
Thanks in advance.
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07-21-2010 09:41 AM
# ADS
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Legacy Member
Go and no-go are for fittng new bbls / rec. / bolt combos to make sure they will chamber in spec ammo. The field gauge is to check for dangerous excessive headspace. If it closes on a field , it needs to be worked on. Be aware that if it just closes on a field gauge , it does not mean it will blow up. It does mean it has worn to the point that it is unwise to waste resources to send it to war if another is available due to it being needed to be sent back soon for repair.
Chris
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Legacy Member
Last year when getting my racker, CMP
told me that they check headspace only with go and no-go. Generally they tried to have it not close on the No-Go, but even if it did, it was OK to shoot, as long as it did not close on the field gauge.
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I will second that, from what I understand not closing on a field guage is still within SAAMI (Ithink that's how you spell it) limits. It is BAD when it will close on a field guage.
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Go and N0-Go are new rifle guages. They are the max and min for NEW rifles. There are a couple of different lengths for field guages as well. As long as the rifle doesn't close os a field guage, you are good to go.
When they tell you to behave, they always forget to specify whether to behave well or badly!
![Bang Head](images/smilies/banghead.gif)
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