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Jeff Siewert

๐Ÿ‘ค Speaker
1310 total appearances

Appearances Over Time

Podcast Appearances

Firearms Radio Network (All Shows)
Reloading Podcast 565 โ€“ Jeff from Bulletology

Yeah, yaw rate's a good way to put it, okay?

Firearms Radio Network (All Shows)
Reloading Podcast 565 โ€“ Jeff from Bulletology

And then some of them are going to come out with, you know, fairly high yaw rate, around eight radians a second.

Firearms Radio Network (All Shows)
Reloading Podcast 565 โ€“ Jeff from Bulletology

OK.

Firearms Radio Network (All Shows)
Reloading Podcast 565 โ€“ Jeff from Bulletology

And so it's a it's a luck of the draw which one you're going to get.

Firearms Radio Network (All Shows)
Reloading Podcast 565 โ€“ Jeff from Bulletology

And if you go closer to zero, there is this little spot just shy of zero where kind of everything is under four radians per second.

Firearms Radio Network (All Shows)
Reloading Podcast 565 โ€“ Jeff from Bulletology

So so, you know, you're you're going to think you see patterns and folks call them nodes, nodes or velocity nodes.

Firearms Radio Network (All Shows)
Reloading Podcast 565 โ€“ Jeff from Bulletology

particularly are garbage.

Firearms Radio Network (All Shows)
Reloading Podcast 565 โ€“ Jeff from Bulletology

Dispersion nodes are probably real, but because you can't get the velocity variability to zero, you can't access these nodes and plan to live within one.

Firearms Radio Network (All Shows)
Reloading Podcast 565 โ€“ Jeff from Bulletology

So that's the blue dots.

Firearms Radio Network (All Shows)
Reloading Podcast 565 โ€“ Jeff from Bulletology

The yellow dots or the orange dots are what's called the cross-velocity

Firearms Radio Network (All Shows)
Reloading Podcast 565 โ€“ Jeff from Bulletology

So that's the bullet just translating laterally sideways.

Firearms Radio Network (All Shows)
Reloading Podcast 565 โ€“ Jeff from Bulletology

And this could be left, right, up, down.

Firearms Radio Network (All Shows)
Reloading Podcast 565 โ€“ Jeff from Bulletology

It kind of doesn't matter.

Firearms Radio Network (All Shows)
Reloading Podcast 565 โ€“ Jeff from Bulletology

And with the yaw rate part, the wobble part,

Firearms Radio Network (All Shows)
Reloading Podcast 565 โ€“ Jeff from Bulletology

those also can be kind of anywhere around the clock looking downrange.

Firearms Radio Network (All Shows)
Reloading Podcast 565 โ€“ Jeff from Bulletology

So this just tells you kind of what the absolute values are.

Firearms Radio Network (All Shows)
Reloading Podcast 565 โ€“ Jeff from Bulletology

It doesn't give you any sense for direction or, it does tell you magnitude, but it doesn't tell you where the bullets, these bullets are going to land.

Firearms Radio Network (All Shows)
Reloading Podcast 565 โ€“ Jeff from Bulletology

But it's interesting to note that

Firearms Radio Network (All Shows)
Reloading Podcast 565 โ€“ Jeff from Bulletology

the responses for the different propellants are kind of wildly different.

Firearms Radio Network (All Shows)
Reloading Podcast 565 โ€“ Jeff from Bulletology

And that's why changing the propellant can have such a large effect on the dispersion behavior we see for our bullets.