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Legacy Member
To head space a rifle you need gauges, GO, No-Go, and possible a field gauges. Insert the gauge in the chamber, I strip the bolt so there is no interference between the gauge and bolt. The bolt should close on the Go gauge. It should not close on the NO-Go gauge or field gauge. You need only apply minimal pressure on the bolt when closing. Do not force the bolt close.
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05-03-2021 10:30 PM
# ADS
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Legacy Member
To head space a rifle is to set up the head space clearance , not to check it . Go and no go gauges are meant to be used to set up the head space . How many barrels have you shanked , cut threads and chambered and installed ? On military rifles head space has to fall in a range of being excessive enough to let any cartridge chamber with dirt to tight enough for the firing pin to set it off . On top of this the Type 99 has such large chambers most will not pass a current made field gauge , but they shoot just fine .
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Legacy Member
Well I have built about 45 1903 1903A3 M1 Garands and have installed new barrel and used barrels and head spaced all with no issues. To check the head spacing is no big deal with gauges. If you don't than that is up to you. But to put 50,000 PSI next to my face I want to know the head spacing is good.
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Contributing Member
Originally Posted by
mark1
You need to CHECK the head space every time you change the barrel or bolt.
If the barrel does not head space you may need to chamber ream barrel to achieve the correct head spacing. Or try different bolts.
Except the OP didn't ask about torquing a barrel, he asked how much torque the action requires. And though that question has already been answered I'll offer that those rifles and actions were never torqued. They were tightened by hand with a screw driver and made real snug. Nothing more.
"You are what you do when it counts."
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