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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

I was at a test one time at Aberdeen with the service, the services.

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

And when they were shooting at a threat vehicle with a long rod and we're taking radar data on this thing.

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

And just prior to impact, the trace went hog shit wild.

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

I mean, it just like it like it hit hit a brick wall.

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

You know, we went down to the target and had a look at it.

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

And and the rod had piled in sideways.

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

I'm like, that bullet must have hit something.

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

The Marine Corps major started tearing down branches up range until he found one where we had actually hit it.

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

And so he bitched at the range people.

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

The next day we came back and they had trimmed all the branches off.

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

So basically, hitting that branch tore the fins off the projectile, made it unstable, and that caused the problem.

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

But there you are.

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

There you are.

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

And then my last slide here, the factors that are important for long-range shooting.

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

Basically, there are two error categories when you're talking long-range shooting.

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

The first is random error.

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

And that causes scatter and the fall of shot around a displaced mean point of impact.

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

Okay.

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

And the mean point of impact is displaced due to bias error.

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

So the bias errors you can correct, okay?