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Unread postAuthor: Ragnarok » Mon Oct 26, 2009 11:34 am

Spooky wrote:How did they do that?

It's not a hard effect to achieve - suffice to say, there are no rifling marks visible on the projectile...
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Unread postAuthor: jackssmirkingrevenge » Mon Oct 26, 2009 11:53 am

Ragnarok wrote:I think one of the more interesting things is how you can see things like the bullet jackets pulling apart down the rifling marks.


Note also that some of the bullets in ballistic gelatin are hollow points with a pre-scored jacket that open up in a predictable and doubtless devastating manner.
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Unread postAuthor: qwerty » Mon Oct 26, 2009 11:59 am

At around the 5:06 mark it looks like a tumbling bullet impacting sideways. How did they do that?


Shoot it out a smoothbore barrel?
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Unread postAuthor: jackssmirkingrevenge » Mon Oct 26, 2009 12:28 pm

qwerty wrote:Shoot it out a smoothbore barrel?


Or through another medium before impacting the gellatin, when a bullet enters a dense medium the nose slows down while the tail wants to keep on moving, causing the bullet to tumble. With some high velocity bullets the rotational force is so strong that it actually tears the bullet apart, providing a devastating fragmentation effect.

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Unread postAuthor: ThegunGuy » Mon Oct 26, 2009 1:55 pm

I thinks its interesting how metals act like a liquid in these tiny time frames. Look at dripping water it looks very similar to this. I love the perfect mushrooming of dome of the bullets in the ballistic gel.
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Unread postAuthor: Ragnarok » Mon Oct 26, 2009 2:41 pm

qwerty wrote:Shoot it out a smoothbore barrel?

Perhaps someone didn't take the time to read my post on the matter...
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Unread postAuthor: jrrdw » Mon Oct 26, 2009 4:56 pm

jackssmirkingrevenge wrote:
qwerty wrote:Shoot it out a smoothbore barrel?


Or through another medium before impacting the gellatin, when a bullet enters a dense medium the nose slows down while the tail wants to keep on moving, causing the bullet to tumble. With some high velocity bullets the rotational force is so strong that it actually tears the bullet apart, providing a devastating fragmentation effect.

Image


I tryed to get the picture to load but keep getting 404 error.
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Unread postAuthor: psycix » Mon Oct 26, 2009 4:56 pm

Ragnarok wrote:I think one of the more interesting things is how you can see things like the bullet jackets pulling apart down the rifling marks.

Yup. Path of least resistance. Most energy-friendly way to rip apart.
But you already knew that.



Did you notice that in some ballistic gelatin shots the cavity has a spiral marking caused by the bullet's rotation?
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Unread postAuthor: Ragnarok » Mon Oct 26, 2009 6:49 pm

psycix wrote:Did you notice that in some ballistic gelatin shots the cavity has a spiral marking caused by the bullet's rotation?

Yeah, that was actually pretty cool, the way the BG was spinning off in a spiral pattern because of the rotation.
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Unread postAuthor: VH_man » Mon Oct 26, 2009 7:50 pm

My favorite was when the bullet would go through the thick sheets of glass, You could see a pressure wave travel through the sides of the glass, and shatter the side opposite to the impact BEFORE the bullet actually reached it, only to have the wave reflect back and shatter the impact side even more.

I dont know what bullet it was, but there was one that just after impact began bubbling up on the back, and then simply "exploded" when it reached a certain point. Very cool. and Nice find.
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Unread postAuthor: spud downunder » Mon Oct 26, 2009 8:57 pm

i thought it was just cool seein the waddcutter? i think, air rifle pellet cut the perfect little hole out of the paper
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