Wonder what he loaded that round with? I know we slipped some doctored ammo into the VC/NVA supply line in Vietnam (Comp C loaded 7.62x39 M1943), which would blow up an SKS, AK-47 or MG of choice. But don't know if any pressure readings or calculations were done.He blew it up on purpose. It's what he does. In this case, he created a failure at about 475,000 PSI.
laugh all you want, but I'm here to tell you that tool works! back in the 80s went with a buddy of mine to Bremerhaven, Germany to pick up his car from the US and every vehicle had to go through a rigorous German vehicle inspection before it was released. he had 4 tires that had threads missing around the edges of the tires, and some other mach-nix things that didn't pass inspection.......took it to a German car repair shop outside the gate, which there were hundreds of those, and they made new threads using that tool