My Headspace Measurements

I followed the guidance in norwich93CMP's video on Youtube.

I first stripped the carbines till only the bolts were in the receiver.  Both carbines were clean, but I gave them another cleaning in the areas highlighted in the video.

The Rock-Ola was checked first.  The bolt easily went into battery with the GO gauge.  Next, I inserted the NO GO gauge.  The bolt would not go into battery unless I pressed down on the large RH lug.  Just for grins, I also tried the FIELD gauge.  The bolt would not go into battery even with downward pressure on the right lug.  Based on these tests, the Rock seems fine.

The NPM Bavarian had pretty much the same results.  The only difference was the NO GO gauge would not go into battery even with downward pressure on the large RH lug.  I would have expected the Bavarian to be OK because it was used by the Austrian Rural Police for many years after WWII.

Next I will use my new USGI Bolt Tool to disassemble and clean my bolts.  Gotta get the darn cosmoline off first! 

No.  Only the NO GO and FIELD would not go into battery; just like the results on the Rock-Ola.