Jeff Siewert

2000 timeframe, we were doing some push testing for the US government on small cow bullets.

And we took, cut up barrel sections and pushed both 5.56 and 7.62 bullets through some barrel sections and measured the push force as a function of travel.

So we could kind of update and integrate that information.

into the interior ballistics models okay so the one of the things that we found was uh once upon a time barnes offered for sale uh a bullet they called the xlc and it had a dry film lube on it and the the the resistance inboard resistance of those bullets was kind of uh

pretty tiny fraction of what it was for the the regular x bullet you know back before they had the triple shot right and and 20 of what the x bullet was it was kind of shocking how big the difference yeah it's um

I think if you were to use that kind of as a physical vapor deposit deposition on the OD of the bullet, it would probably work just fine.

Have we got images?

Yep.

Okay, cool.

Okay.

All right, let's move on here.

Yeah, so we've got brass, the old standby.

There are steel cartridge cases.

That one happens to be a Russian 545 by 39 and got a lacquer coating on it for corrosion protection.

then aluminum, handgun cartridge.

And those, you know, aluminum is kind of the material of the future, right?

It was first introduced commercially, well, not commercially, in military sense in the early 70s with the development of the Goway cartridge on the A-10 aircraft.

So aluminum has been around as a cartridge case material for a long time.

Next one over is a combination brass plastic cartridge case.

After that is a steel plastic that was made by True Velocity.