So what actually happens if.....

popcan

popcan

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Just wondering what actually occurs if

  1. a round is tossed into a fire,
  2. or if the primer on a round is impacted, -not in a chamber or anything that will trap the gases or contain the explosion of the powder?
Saw a movie last night where the hero zap strapped a .45 round to a piston, which was presumably "fired" when the piston moved up against something else. The fired bullet then impacted a tank of liquid nitrogen and caused it to wipe out the villan. :confused:



seemed highly improbable, but that's hollywood I guess.
 
This was on mythbusters a while ago. If I remember correctly, injury yes, death no. My buddies were telling me a while ago when they were in cadets, they used to hit 22s with a hammer on the range floor and watch the cases spin like mad, but there were never any injuries.
 
In a fire.
The brass cases will split before pressures get anywhere near the normal 50,000lbs in a rifle chamber. Possible injurys..yes from flying brass shrapnel, likely the bullet would be the only thing that didn't move :D
 
I know that a shotshell just goes POP in a fire, and that's it. Metallic cartridges make a bigger bang, but any injury will be the result of the case flying around, not the bullet.
 
Did you also see the Mythbusters episode where they shot a 9mm at a 100lb propane tank? It dinted the tank but bounced off.

An unsupported cartridge case won't be able to withstand much pressure, velocity of the case and bullet will be nominal. Note that both the bullet and case will move in opposite directions with the same amount of ENERGY.

Obviously the heavier the projectile, the slower it will be moving to have the same amount of energy.
 
SandRoad said:
Did you also see the Mythbusters episode where they shot a 9mm at a 100lb propane tank? It dinted the tank but bounced off.

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Click to expand...

After reading about german"arcane" Ammo years ago made some from brass rod in my 9mm went thru both sides of a fire extinguisher" heavy pre-pressurized one at 10 yds. frame of reference is key
 
Jeez I wish people would use punctuation don't you otherwise it is hard to understand what the heck they are trying to say is it asking so much to use the tools of civilization no wonder there are misunderstandings I know rambling on hey
 
A .22 goes bang, but there's no frag. A centrefire makes a louder bang, but still no frag.
"...cadets, they used to hit 22s..." No officer around? Cadets weren't allowed to play with firearms or ammo without an officer around. Said officer would be in big do-do.
Neither of those bozos on Mythbusters know anything about firearms.
"...at a 100lb propane tank..." Shooting propane cylinders is boring. Nothing happens when a cylinder is penetrated other than a lovely white cloud spreading over the ground. Gets kind of exciting when an incendiary is fired into the cloud though. Incendiaries are illegal, of course.
 
"...Ok cadets..." It's actually, "You, hold this while Johnny hits it."
Never did manage to get most of 'em to burn after pillaging, etc.
 
Reminds me of when I was a kid and took a tin of the charges for my Dads Ramshot power hammer and set them off between rocks. I'd place a charge between two medium rocks, and then hurl a bigger rock at them from behind a dumpster behind school.
 
I once put a 30-30 round through a hole in a 1x4 so the primer was facing me and aimed at the primer from 50 yards with a 22 LR. The 22 struck the cartridge rim, not the primer and detonated the 30-30 round with a POP. When I examined the spent 30-30 cartridge the primer was ejected from its pocket as it was not suported by a bolt face, the unsuported portion of the brass was peeled back like a bannana and the bullet went into the backstop.
 
I've seen cartridges in fires and on hot plates.
In the fire, the bullet and brass slowly separated as the cartridge heated up. Then the powder ignited and pushed the brass either completely out of the fire or deeper into it.
When it pushed it out, there was also a loud pop, from the primer.
When it pushed it further into the fire, there was a spray of sparks and a barely audible pop.
Nothing at all spectacular.
When the cartridge was on a hotplate, it was dureing a public demonstration, there was a paper bag that covered the whole thing. When the cartridge separated, there was a bunch of smoke that came out from under the edge of the bag and nothing else happened, the primer didn't get hot enough to ignite.

bearhunter
 
I witnessed a .44-40 black powder loaded cartridge, with a possible protruding primer, miss feed in a Winchester 73 clone, so it was ejected and it landed on its base on a concrete floor and detonated . It went off like a firecracker embedding brass into the shooters boots and because the base was supported , the bullet was launched straight up and hit the shooter on the lower bone on his lower arm. It bruised but did not break the skin but from the shooters reaction it must have hurt like hell and the shock of it happening put the shooter out of commission for 10 or so minutes.
 
I have had a .357 mag shell go off with a tremendous bang and the brass come whizzing out of the fire because someone had thrown a dud shell in the paper garbage and the paper then dumped in a fire pit. Also as a kid we put .303 blanks in a piece of aluminum tv arial and dropped that in a burning incinerator. goes off with a tremendous bang and peels the tubing back around the shell as well as blowing the tubing out of the incinerator for a short distance

cheers mooncoon
 
We burn all our discarded rounds in a metal 45 gal. drum with diesel fuel. Place the rounds (1/2 a 5 gal pails worth) on a metal screen (finer than a .22 round) about 6-10 inches above the bottom of the barrel. Ad about a gallon of diesel and throw in a lit newspaper (diesel is hard to light with just a match). They go "pop" but NEVER leave the screen on top of the barrel or even dent the drum. It takes about 45 mins till all the popping stops.

Burning loaded rounds is the safest way to dispose of them!

The brass (when cooled) is sold as scrap for 60 cents a pound!



Disclaimer: Not to be tried indoors or in your back yard! Use common sense!
 
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