Jeff Siewert

Two milliseconds is the total time of the analysis.

And that includes the, we could call it the blowdown, the emptying of the gun after shot exit.

Can you play that again, please, Mike?

Sure.

And I'm going to ask it, can you stop it by any chance?

Okay, run the go button.

Okay, stop.

Okay, so where we are here, so up at like 1.85 to just over two inches from the barrel, that downward sloping going from left to right, that's the case neck.

And between there and 1.7 inches,

is the shoulder.

We don't do a particularly good job of analyzing the shoulder, but basically what's happened is we've contacted the wall at 1.7, and that contact point is running backwards as the pressure increases in the cartridge case.

Mash the run button there for me, would you, Mike?

Yep.

It goes all the way out, and now the case is in contact with the chamber wall,

It continues to deflect outward, and then as the pressure comes off, the combined structure comes back, and then you'll see it dip below the 0.004 inch as the pressure in the case continues to blow down.

And you can see it, with the exception of perhaps down by 0.9, most of it comes out of contact with the case, with the chamber wall.

We're back to the beginning.

Yep.

Yes, there's substantial load shed in friction at the case exterior chamber interior interface, provided the surfaces are dry, and we're talking about a metal cartridge.

I have heard that before.