Barrel install

[bigred94]

Ok just set headspace (I think). Have a question. On the fl trimmed case it's tight but will close. On a factory federal round it closes very easy. Can someone explain what's happening?

[Nandy]

My understanding is that some manufacturers cases are smaller than sami specs. So if you headspace using brass that is smaller than Sami specs when you put a shell that is up to sami it will chamber tight or not chamber at all. That is why I tell everyone to head space using a gauge which will be up to sami. That is the only way to make sure all rounds will work. If you are reloading and have zero plan to use commercial ammo then headspacing with the same brand brass you will be using is not such a big deal.
Good luck.