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Checking Head Space On A Johnson Rifle

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Question for the experts can you use regular head space gauges for the Johnson rifle.I have military ones i use for my M1s if so do you do it the same way  as the M1.Thank You

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Yes, you can use same gages.  In the gun, hook extractor over gage lip first and close gently.  Operating handle should close on go gage (1.946") and not on no-go (1.950").  Do not force handle.  If you do it out of gun, it is little tricky to get alignment.  I have seen a replacement barrel which had a short chamber and would not close on 1.940" minimum gage.   Every original barrel were within specs.  A more common problem is superfine pitting in chamber making extraction difficult and preventing cycling.

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Thank You so much Joseph for your time and help Gary

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This is an original Johnson barrel the bolt would not close on my 1.1950 no gage hooking extractor over gage lip as you directed a little tricky as you said and it would close on a go gage 1.946 I should be able to shoot my Johnson with no problems Thank You Gary

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On 7/5/2016 at 4:57 PM, Joseph Scott said:

Yes, you can use same gages.  In the gun, hook extractor over gage lip first and close gently.  Operating handle should close on go gage (1.946") and not on no-go (1.950").  Do not force handle.  If you do it out of gun, it is little tricky to get alignment.  I have seen a replacement barrel which had a short chamber and would not close on 1.940" minimum gage.   Every original barrel were within specs.  A more common problem is superfine pitting in chamber making extraction difficult and preventing cycling.

I went back and found this from Joe in response to a question about using "regular" 30.06 headspace guages.

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