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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

So the H4350 had a muzzle velocity variability of

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

eight feet per second.

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

The W760 had 15 feet per second.

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

The Vargot had four feet per second.

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

And the H100V had a velocity variability of 10 feet per second.

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

And so let's talk about all the graphs here with the blue dots and the orange dots.

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

So the blue dots are what's called the yaw rate.

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

That's the wobble of the bullet

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

as it initially exits the barrel.

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

And that's one of the primary sources of the

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

the fall of shot scatter at the target.

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

We know it's dispersion.

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

Some folks call it accuracy.

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

It's not accuracy really.

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

But so, you know, and at zero in the middle of each of these charts is the average muscle velocity.

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

And then we go out from outwards from there, left and right, there's plus and minus one, two, and three standard deviations or sigma from the average

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

So that's the variation that you're going to see as a result of firing lots and lots and lots of bullets, okay?

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

And you can see that, like, I'm going to just pick on the H4350 for a little bit.

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

So there's, you know, it's pretty easy to see that there are waves in that response map.

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

So there are, you know, like just shy of minus one standard deviation in muzzle velocity, there are some bullets that are going to come out with very small initial yaw rate.