Ok folks, don’t know if I mentioned this yet but I found a bag of fired cases (.500 CBC) and was scratching my head because if they were fired then they musta fit! Turns out that “those” cases measured .015 on the case wall! So now I’m assuming that all CBC cases are not created equal!
I’m also wondering if Magtech loads a smaller (.495) bullet in the thick walled cases. If those bullets are hollow based then that would permit proper “obturation” but that’s only a theory.
Update...put a call into Magtech, waiting on tech to email me back