Head spacing a new to me barrel

[Neil 0]

Hello,

I know the proper way to headspace Garand rifles and ‘03s, but how do you properly headspace a Johnson?

Thank you 

Neil 

[Brian Alpert 0]

Place the gauge in the chamber and manually close the bolt by sliding the Op Handle forward and rotating it down.  It will fully close on a "Go" gauge but not or with difficulty on a "No Go or Field".  The OP HANDLE musty rotate down to fully close.  Purists take off the extractor to perform headspace tests.

[Neil 0]

Thank you, sir. 

I was over thinking it. I thought too hard and too long about the reciprocating barrel/bolt interaction and couldn’t come up with a good solution. 
 

Neil

[Orlando 0]

Im not a "purist" but I do recommend stripped the bolt first .  Do not force handle to close, you will ruin the gage. Basically close with very light finger pressure