Now I am back to where I was last year trying to figure this out with Lollygagger. I tried the 3m tape method that the AK builders use and all my skss still went into battery with the bolt closed. These were factory matching bolts that have zero problems. I quit after I got to five layers. The AK guys told me theirs still close too but they have no problems. Its like everyone just talks about how headspacing is so important on AKs and SKSs but its not really followed. And no disasters? Confusing for sure. This issue has never really been figured out on this board or anywhere else I can find. Its one of the reasons I was glad to see this bolt hit the market. I spent alot of time on this last year and never felt like it was resolved.
Could be the reason there have been no disasters is that most of the imported rifles have headspace that is within safe limits.
Bad headspace doesn't mean that the rifle will immediately "blow up".
It would take some out of whack headspace for that.
Headspace is a specification. Just like the settings on the engine on your car.
Your car may run with the lifters loose or the carburetor set rich or even the oil level low,
but anyone that knows what they're doing will set those things to the correct specifications.
People that work at an arsenal, can't refurbish a rifle, using miscellaneous spare parts,
then just slap them together and send the rifle out for use without knowing they are within
reasonable limits. That would be taking a big chance.
You ask if some people are just lucky?
Yes, I think they are.
They're lucky for the set of standards that most things were produced under in the last century and that for the most part, things are made pretty uniform.
I've just been one that doesn't like to take chances, especially with things that go boom.
There's a lot of pressure in that chamber and like most things, we tend to become lax on how we think about that.
So far, we haven't heard about a lot of accidents with surplus firearms, thank goodness.
I just don't want to do things in such a way that I increase my chances of being the first.