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I think that's the air in the temporary cavity igniting as the cavity collapses and the pressure increases. ETA: Sonoluminescence. View Quote View All Quotes View All Quotes Quoted:
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WTF? Is there a secondary explosion as the gel contracts after the projectile has exited? Yes. Observed often in Clear Ballistics, and sometimes even in organic gel. I think that's the air in the temporary cavity igniting as the cavity collapses and the pressure increases. ETA: Sonoluminescence. Same shit with submarines when they die underwater. They implode so fast that the air pressure eventually ignites the oxygen and flash fries the whole crew. |
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So get a good shooter with a LaRue or some other 1/2 MOA rifle and hit the target at 600 yards! How hard can it be? ![]() View Quote View All Quotes View All Quotes Quoted:
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Work with him to set up some video of the common polymer tipped bullets at 100, 200 and 300 yards (or further if accuracy allows) to test the "melting tip" claims Hornady came up with. If you can get a clear shot of a previously sharp tip drooping or deforming due to heat and drag Hornady ought to be willing to pay some cash for the ad copy! The tip isn't going to droop at 240,000 revolutions per minute. At best, you might be able to get a vague mushroom shape, but out starting around 600 yards. So get a good shooter with a LaRue or some other 1/2 MOA rifle and hit the target at 600 yards! How hard can it be? ![]() It would be better visually with a bigger bullet, like a 308. The pics would be interesting. |
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Thanks for that test!
Awesome video of a devastating round. I saw InfiniteGrim's video in the ammo forum and was very impressed with his test as well. Someone asked him to take it down, for sure. I'm looking forward to your 50 gr TSX video. Can you tell us what velocity you got with that before releasing the video? |
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I've started loading 55 gr tipped tsx. Any feedback on those?
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WTF? Is there a secondary explosion as the gel contracts after the projectile has exited? It looks like it. I wonder what caused that? sonoluminescence Again, what is seen in this video is not sonoluminescence. It is combustion from dieseling of gel vapor (fuel) and oxygen (oxidizer) in the temporary cavity. Actual sonoluminescence does not involve combustion. It is air excited to the point it emits light without combustion. In this video, the combustion byproducts, and also the color of the flash, make the fact this is combustion clear. |
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Thanks for taking the time to test and post the results. Awesome stuff.
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So why do I always see ballisic gel photos of m855 showing maximum cavity diameter at around 12"-14" penetration? Is this round that much improved? Is this particular gel a different consistency? Is one shot at distance velocity and the other at muzzle velocity?
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So why do I always see ballisic gel photos of m855 showing maximum cavity diameter at around 12"-14" penetration? Is this round that much improved? Is this particular gel a different consistency? Is one shot at distance velocity and the other at muzzle velocity? View Quote This new round is pretty badass. ![]() |
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So why do I always see ballisic gel photos of m855 showing maximum cavity diameter at around 12"-14" penetration? Is this round that much improved? Is this particular gel a different consistency? Is one shot at distance velocity and the other at muzzle velocity? View Quote Clear gel exaggerates something, I think, compared to normal gel. Maybe it's the temporary cavity. Or A1 is just that much badder-assed. |
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Yes. The flash/explosion in the gel hasn't been very well explained so far. The best explanation I have seen is that the hot bullet vaporizes some of the gel (which is flammable) and between the friction, heat of the bullet, and air being sucked into the temporary stretch cavity, as the TSC collapses it acts like a diesel engine and compresses the mixture of heated gel vapor and air until it explodes. You can see the exhaust gas exiting the entrance hole. View Quote View All Quotes View All Quotes Quoted:
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WTF? Is there a secondary explosion as the gel contracts after the projectile has exited? The flash/explosion in the gel hasn't been very well explained so far. The best explanation I have seen is that the hot bullet vaporizes some of the gel (which is flammable) and between the friction, heat of the bullet, and air being sucked into the temporary stretch cavity, as the TSC collapses it acts like a diesel engine and compresses the mixture of heated gel vapor and air until it explodes. You can see the exhaust gas exiting the entrance hole. Sonoluminescence can also be found in the collapse of underwater bubbles... Sonoluminescence is the emission of short bursts of light from imploding bubbles in a liquid when excited by sound. ETA: Now I understand you meant the fireball! not the "flash of light" |
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Coolest video I have seen in quite some time. Keep 'em coming please.
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Quoted: Thanks for that test! Awesome video of a devastating round. I saw InfiniteGrim's video in the ammo forum and was very impressed with his test as well. Someone asked him to take it down, for sure. I'm looking forward to your 50 gr TSX video. Can you tell us what velocity you got with that before releasing the video? View Quote |
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Quoted: Clear gel exaggerates something, I think, compared to normal gel. Maybe it's the temporary cavity. Or A1 is just that much badder-assed. View Quote View All Quotes View All Quotes Quoted: Quoted: So why do I always see ballisic gel photos of m855 showing maximum cavity diameter at around 12"-14" penetration? Is this round that much improved? Is this particular gel a different consistency? Is one shot at distance velocity and the other at muzzle velocity? Clear gel exaggerates something, I think, compared to normal gel. Maybe it's the temporary cavity. Or A1 is just that much badder-assed. |
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I wonder if that is as effective as .300 Blackout subsonic? Just kidding. I bet I had you seeing red. Thanks for posting the video. |
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Quoted: I wonder if that is as effective as .300 Blackout subsonic? Just kidding. I bet I had you seeing red. Thanks for posting the video. View Quote My next video I'm going to play a gunshot noise and throw a pulled SMK at the gel block and then when I go to inspect the damage I'll just say "hmm, bounced right off the gel block". |
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Chemist here. It is definitely "dieseling." From my research I am reasonably confident that those blocks are composed of a mineral oil gel. Mineral oil is a petroleum derivative that is to diesel what diesel is to gasoline. It's not flammable under normal conditions but would be under these extreme conditions. ETA: The geek term is adiabatic compressed ignition. View Quote Serious question to 10mm_, bluefalcon and other gel knowledgeable folks (or TescoVee). Could the "adiabatic compressed ignition" be causing additional damage to the permanent wound channel that would otherwise not happen thus making some rounds look more impressive than they really are? It seems like that kind of violent expansion and contraction would create tears in the material that would otherwise not be there from the round minus the "explosion". |
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I got contacted by a DOD investigator today about something like this. Pepper your angus.
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Draw some calibrated line marks in a grid pattern. Would make a great analysis in semi-fluid dynamics.
Great vid op. Engoy all your stuff that you post here. Txl |
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Anyone besides me notice the initial fragmentation happens in the first 4 to 6 inches? This stuff will never kill jihadis!
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Quoted: Serious question to 10mm_, bluefalcon and other gel knowledgeable folks (or TescoVee). Could the "adiabatic compressed ignition" be causing additional damage to the permanent wound channel that would otherwise not happen thus making some rounds look more impressive than they really are? It seems like that kind of violent expansion and contraction would create tears in the material that would otherwise not be there from the round minus the "explosion". View Quote View All Quotes View All Quotes Quoted: Quoted: Chemist here. It is definitely "dieseling." From my research I am reasonably confident that those blocks are composed of a mineral oil gel. Mineral oil is a petroleum derivative that is to diesel what diesel is to gasoline. It's not flammable under normal conditions but would be under these extreme conditions. ETA: The geek term is adiabatic compressed ignition. Serious question to 10mm_, bluefalcon and other gel knowledgeable folks (or TescoVee). Could the "adiabatic compressed ignition" be causing additional damage to the permanent wound channel that would otherwise not happen thus making some rounds look more impressive than they really are? It seems like that kind of violent expansion and contraction would create tears in the material that would otherwise not be there from the round minus the "explosion". |
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Sounds like bullshit to me, got some proof and further detail? View Quote View All Quotes View All Quotes Quoted:
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I got contacted by a DOD investigator today about something like this. Pepper your angus. Emailed. |
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