@ Ratshooter.
Of the two I have right now,
When I got them I checked the headspace, and one was good on the No-Go and the other was good on the Field Gage.
But after firing less the 100 rounds of Surplus ammo in each of them, the one that was good on the Field, would close on the Field gage.
That is when I pulled both barrels off and you could see evidence of set back in the receivers.
But the one receiver that was showing Good on the No-Go was deceptive.
The gage was stoping the bolt rotation, indicating the Headspace was good.
But when you Measured the distance from the front of the receiver ring to where the bolt stoped, and the distance where the bolt would be on Full close, it showed the set back in Full Close lock up was beyond the headpace limits, due to the set back step.
I set back both barrels, and set the headspace Snug On the GO Gage.
But the one Mauser in not too long of time had the headspace increase so it was again loose on the Go Gage but still Good on the No-Go gage.
I pulled the .308 barrel and put on an 8mm barrel that I had taken off a Turkish Mauser.
I only shoot Reduced Load cast bullets in that rifle now, but will not sell it to anyone in that condition even though the barrel has been engraved with a Warning Label about the reduced Loads.
But the other .308 still works good, and I am carefull to only shoot mild to Moderate loads in that gun, and it seems fine .
If you know your guns, and know what to look for in the Lock up, the .308 in this style of rifle will work, but it is in NO Way a rifle that can Handle the .308 full house loads.
And IMO, if a gun can not Chamber and Fire Safely, the Full Range of ammo in that Caliber, then it is not truely safe to fire.