So I'm finally getting around to making a barrel swap video and I recently disassembled my Savage 12FV (308 Win) that I got last year on Black Friday. It headspaced at 1.631" (I have a 10-piece headspace gauge set). With a 1.631" gauge, and taking protrusion measurements off the gauge and depth measurements off the factory bolt, I got a factory gap of around 0.015" from bolt lug face to breech face.

I swapped in a Criterion featherweight barrel and using a GO gauge (1.630") the gap with the factory bolt head increased to 0.025".

PTG sent me a bolt when they sent me the action wrench to demo and it has a deeper bolt face of 0.130". My protrusion with the Criterion barrel is 0.131". With a PTG bolt, that gap is now 0.001". That's sort of okay for me since I'll be chambering it to 1.632" anyways, as I don't like using SAAMI minimum, and the gap will be 0.003".

What's the recommended max/min bolt lug face to breech face distance? I was going to recommend 0.005" to 0.010" for a general purpose rifle.

Tony.