Hi all,
Trying to complete my second build. This one has been a bit of a challenge. Working with a SS criterion barrel for 6.5 swede. Have a magnum receiver that I'm trying to work over to make work. I've got the barrel nut on as far as it will go. Then I've screwed the barrel to the receiver. Currently unable to bottom out on the go-gauge. Still using the magnum bolt head for the moment, but shouldnt the Bolt head contact the gauge? Currently the barrel nut, the lug, and the receiver are mated together and not contacting the gauge. Any ideas? The barrel nut will NOT go on any further. The barrel nut is also old, likely pre 99 if that matters.

Thanks for any ideas. I will put standard bolt head and Bolt together when new (smaller) firing pin arrives, but don't see how that will help with headspacing.