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Now in Florida
Picture of ChicagoSigMan
posted
750gr .50 Cal bullet at 20 yards.

Sure the impact would still probably kill you, but just the fact that the vest stopped the round is damned impressive. And the vest only weighs 4 lbs and floats.

 
Posts: 6084 | Location: FL | Registered: March 09, 2009Reply With QuoteReport This Post
Bolt Thrower
Picture of Voshterkoff
posted Hide Post
Surprising, M855 goes through it like butter.
 
Posts: 10088 | Location: Woodinville, WA | Registered: March 30, 2004Reply With QuoteReport This Post
Fighting the good fight
Picture of RogueJSK
posted Hide Post
quote:
Originally posted by ChicagoSigMan:
Sure the impact would still probably kill you


That's the rub.

There are two factors that are measured when determining whether body armor is truly able to safely stop a round: penetration and "back face deformation". (Put simply, back face deformation measures how much of the impact force is transmitted into the wearer on the back side of the armor.)

A projectile can fail to penetrate, but still transmit sufficient blunt force from the impact to be fatal.

That's one of the main reasons why simply hanging a vest from a target stand or propping a vest up against a tree isn't a very effective means of testing armor. It only determines penetration. Actual testing of armor is done on blocks of calibrated ballistic clay, to record and measure back face deformation.

That's also the reason why rifle armor consists of hard plates. Some soft armors may be able to stop some rifle projectiles from penetrating, but the full blunt force of that rifle cartridge is centered on a small area of the soft armor, likely causing larger amounts of back face deformation from the increased power of the rifle round. With hard plates, the blunt force of an impact is spread out over the entire rigid plate, so it can not only prevent a rifle round from penetrating, but also help mitigate the blunt force impact by spreading it out across a wider area.
 
Posts: 33568 | Location: Northwest Arkansas | Registered: January 06, 2008Reply With QuoteReport This Post
Ice age heat wave,
cant complain.
Picture of MikeGLI
posted Hide Post
I still don't wanna get shot with a .50.

Or anything for that matter.




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Posts: 9784 | Location: Orlando, Florida | Registered: July 12, 2005Reply With QuoteReport This Post
Now in Florida
Picture of ChicagoSigMan
posted Hide Post
quote:
Originally posted by RogueJSK:
quote:
Originally posted by ChicagoSigMan:
Sure the impact would still probably kill you


That's the rub.

There are two factors that are measured when determining whether body armor is truly able to safely stop a round: penetration and "back face deformation". (Put simply, back face deformation measures how much of the impact force is transmitted into the wearer on the back side of the armor.)

A projectile can fail to penetrate, but still transmit sufficient blunt force from the impact to be fatal.

That's one of the main reasons why simply hanging a vest from a target stand or propping a vest up against a tree isn't a very effective means of testing armor. It only determines penetration. Actual testing of armor is done on blocks of calibrated ballistic clay, to record and measure back face deformation.

That's also the reason why rifle armor consists of hard plates. Some soft armors may be able to stop some rifle projectiles from penetrating, but the full blunt force of that rifle cartridge is centered on a small area of the soft armor, likely causing larger amounts of back face deformation from the increased power of the rifle round. With hard plates, the blunt force of an impact is spread out over the entire rigid plate, so it can not only prevent a rifle round from penetrating, but also help mitigate the blunt force impact by spreading it out across a wider area.


I don't think this was intended to be an actual test or that they are selling the vest as protection against a .50 cal. If you take the video for what it is, it is pretty damn impressive if you ask me.
 
Posts: 6084 | Location: FL | Registered: March 09, 2009Reply With QuoteReport This Post
Frangas non Flectes
Picture of P220 Smudge
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The label on the back of it is interesting. It's rated to stop a .338 Lapua 300 grain but immediately after that follows "(LARGE BACKFACE DEFORMATION)"

Hey Gecko45! The internet has heard your cry and answered it!


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Posts: 17910 | Location: Sonoran Desert | Registered: February 10, 2011Reply With QuoteReport This Post
Drill Here, Drill Now
Picture of tatortodd
posted Hide Post
quote:
Originally posted by ChicagoSigMan:
quote:
Originally posted by RogueJSK:
quote:
Originally posted by ChicagoSigMan:
Sure the impact would still probably kill you


That's the rub.

There are two factors that are measured when determining whether body armor is truly able to safely stop a round: penetration and "back face deformation". (Put simply, back face deformation measures how much of the impact force is transmitted into the wearer on the back side of the armor.)

A projectile can fail to penetrate, but still transmit sufficient blunt force from the impact to be fatal.

That's one of the main reasons why simply hanging a vest from a target stand or propping a vest up against a tree isn't a very effective means of testing armor. It only determines penetration. Actual testing of armor is done on blocks of calibrated ballistic clay, to record and measure back face deformation.

That's also the reason why rifle armor consists of hard plates. Some soft armors may be able to stop some rifle projectiles from penetrating, but the full blunt force of that rifle cartridge is centered on a small area of the soft armor, likely causing larger amounts of back face deformation from the increased power of the rifle round. With hard plates, the blunt force of an impact is spread out over the entire rigid plate, so it can not only prevent a rifle round from penetrating, but also help mitigate the blunt force impact by spreading it out across a wider area.


I don't think this was intended to be an actual test or that they are selling the vest as protection against a .50 cal. If you take the video for what it is, it is pretty damn impressive if you ask me.
Years ago, a Sigforumite had a sig line that said something close to, "penetration doesn't matter if the front of your vest is touching the back of your vest". He was referring to shotgun slugs vs body armor, but it seems apropos in this thread as well.



Ego is the anesthesia that deadens the pain of stupidity

DISCLAIMER: These are the author's own personal views and do not represent the views of the author's employer.
 
Posts: 24023 | Location: Northern Suburbs of Houston | Registered: November 14, 2005Reply With QuoteReport This Post
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posted Hide Post
750 grain Amax bullet. The results would probably be different with a military bullet.


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Posts: 13504 | Registered: January 17, 2011Reply With QuoteReport This Post
Political Cynic
Picture of nhtagmember
posted Hide Post
quote:
Originally posted by P220 Smudge:
The label on the back of it is interesting. It's rated to stop a .338 Lapua 300 grain but immediately after that follows "(LARGE BACKFACE DEFORMATION)"

Hey Gecko45! The internet has heard your cry and answered it!


yes, it will stop the bullet, but we're bettin' yer still gonna die from blunt force trauma Big Grin



[B] Against ALL enemies, foreign and DOMESTIC


 
Posts: 54101 | Location: Tucson Arizona | Registered: January 16, 2002Reply With QuoteReport This Post
Freethinker
Picture of sigfreund
posted Hide Post
quote:
Originally posted by wcb6092:
750 grain Amax bullet. The results would probably be different with a military bullet.


Based on a quick Internet search, the velocity of the 661 grain M33 round is 2750 fps; the claimed velocity of the 750 grain A-MAX is 2820 fps. That means their respective energies are ~11100 and ~13240 foot-pounds. I would imagine that a 50 BMG armor piercing bullet would penetrate, but do not know that the M33 would perform any better than the Hornady.




6.4/93.6

“ Enlightenment is man’s emergence from his self-imposed nonage. Nonage is the inability to use one’s own understanding without another’s guidance. This nonage is self-imposed if its cause lies not in lack of understanding but in indecision and lack of courage to use one’s own mind without another’s guidance.”
— Immanuel Kant
 
Posts: 48019 | Location: 10,150 Feet Above Sea Level in Colorado | Registered: April 04, 2002Reply With QuoteReport This Post
Member
Picture of wrightd
posted Hide Post
quote:
Originally posted by tatortodd:
quote:
Originally posted by ChicagoSigMan:
quote:
Originally posted by RogueJSK:
quote:
Originally posted by ChicagoSigMan:
Sure the impact would still probably kill you


That's the rub.

There are two factors that are measured when determining whether body armor is truly able to safely stop a round: penetration and "back face deformation". (Put simply, back face deformation measures how much of the impact force is transmitted into the wearer on the back side of the armor.)

A projectile can fail to penetrate, but still transmit sufficient blunt force from the impact to be fatal.

That's one of the main reasons why simply hanging a vest from a target stand or propping a vest up against a tree isn't a very effective means of testing armor. It only determines penetration. Actual testing of armor is done on blocks of calibrated ballistic clay, to record and measure back face deformation.

That's also the reason why rifle armor consists of hard plates. Some soft armors may be able to stop some rifle projectiles from penetrating, but the full blunt force of that rifle cartridge is centered on a small area of the soft armor, likely causing larger amounts of back face deformation from the increased power of the rifle round. With hard plates, the blunt force of an impact is spread out over the entire rigid plate, so it can not only prevent a rifle round from penetrating, but also help mitigate the blunt force impact by spreading it out across a wider area.


I don't think this was intended to be an actual test or that they are selling the vest as protection against a .50 cal. If you take the video for what it is, it is pretty damn impressive if you ask me.
Years ago, a Sigforumite had a sig line that said something close to, "penetration doesn't matter if the front of your vest is touching the back of your vest". He was referring to shotgun slugs vs body armor, but it seems apropos in this thread as well.

I remember that exactly, that was pretty good.




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Posts: 9159 | Location: Nowhere the constitution is not honored | Registered: February 01, 2008Reply With QuoteReport This Post
Coin Sniper
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posted Hide Post
You know damn well some idiot is going to try it live




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Posts: 38511 | Location: Above the snow line in Michigan | Registered: May 21, 2004Reply With QuoteReport This Post
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Picture of wrightd
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I would pay money to see that. Best case, multiple broken ribs with organ damage, worst case might be DRT.




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Posts: 9159 | Location: Nowhere the constitution is not honored | Registered: February 01, 2008Reply With QuoteReport This Post
Member
posted Hide Post
I recall pictures of a IIIA vest stopping a .44 Magnum, then they showed pictures of the clay behind it. The BFD pretty much said, hey, this vest will make sure you have an open casket funeral.
 
Posts: 1441 | Location: County 18, OH | Registered: April 11, 2007Reply With QuoteReport This Post
Just for the
hell of it
Picture of comet24
posted Hide Post
Really impressive for the weight and thickness of that plate.

Sure the deflection may still kill you or at least make for a very bad day but it stopped a .50 from penetrating.


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Because in the end, you won’t remember the time you spent working in the office or mowing your lawn. Climb that goddamn mountain. Jack Kerouac
 
Posts: 16495 | Registered: March 27, 2004Reply With QuoteReport This Post
Let's be careful
out there
posted Hide Post
once saw a guy take a .40 right on the trauma plate. He wasn't "hurt' but he couldn't breathe very well for about ten minutes, and had a helluva rectangular bruise the next day. FROM A PISTOL CALIBER
 
Posts: 7334 | Location: NW OHIO | Registered: May 29, 2006Reply With QuoteReport This Post
Member
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posted Hide Post
Yes, well, if you line up enough Peeps, they'll turn a .50 before it gets to the chocolate bunny.


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Posts: 16338 | Location: Florida | Registered: June 23, 2003Reply With QuoteReport This Post
There is a world elsewhere
Picture of Echtermetzger
posted Hide Post
It would make a lousy vest, but it might make some nice light armor panels for an ultra-light vehicle. Attach them on the frame so these guys would have something a little more protection than the open air.



A well balanced breakfast being necessary to the start of a healthy day, the right of the people to keep and eat food shall not be infringed.
 
Posts: 6685 | Location: The hard land of the Winter | Registered: April 14, 2003Reply With QuoteReport This Post
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