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Posted: 10/8/2004 1:10:12 PM EST
How hot is a bullet 1/2 second after being fired from a high powered rifle? (.270, 30-06 etc...)
I was watching some video of some deer kills and it looks like smoke coming out of the exit hole about the time the deer hits the ground. I'm guessing it is hair smoking off from the heat of the bullet but am not sure. Anyone else seen this?
Link Posted: 10/8/2004 1:12:41 PM EST
Very hot.
Link Posted: 10/8/2004 1:12:51 PM EST
[Last Edit: 10/8/2004 1:13:08 PM EST by cyanide]
More likely it was tissue mist.
Link Posted: 10/8/2004 1:15:51 PM EST

Originally Posted By cyanide:
More likely it was tissue mist.



It was not at the instant the bullet exited, it was a second or so later and relly looked like smoke.
Link Posted: 10/8/2004 1:17:04 PM EST
[Last Edit: 10/8/2004 1:19:18 PM EST by Observer]
This has actually been measured and photographed. The first link is from a FAL www.indigosystems.com/PDF/articles/AdvImg3-04.pdf
and the sccond is 5.56 from an AR www.indigosystems.com/PDF/articles/R&D_article.pdf)

From the barrel friction it's heated somewhere in the neighborhood of 300 degrees Celsius so yep it's hot enough to steam on the way out. But the contact time is so short I don't know that that is what you've witnessed.

If you want to measure it yourself they even provide helpful tips!

Link Posted: 10/8/2004 1:17:14 PM EST
lots of big game have dust or dander in their fur and sometimes the smoke is the strike on the ground of an exiting round
Link Posted: 10/8/2004 1:19:20 PM EST
In typical cool deer hunting season in MI and IN, it would be water vapor, or we could say...steam.
Link Posted: 10/8/2004 1:21:01 PM EST
if it was a lung hit it could have been blood in mist form or steam escaping from the hole I have seen this happen before.
Link Posted: 10/8/2004 1:31:53 PM EST
Learn something every day......300C huh? interesting.....
Link Posted: 10/8/2004 1:51:23 PM EST
Don't forget that the kinetic enegy of the bullet is absorbed by the tissue as it passes through and ultimately it comes to rest. This kinetic energy is converted to HEAT. There is no doubt the bullet is hot all by itself. Supplement this internal thermal energy (heat) with the dissipated kinetic energy and it's entirely conceivable you could generate some steam. Not much, but some.
Link Posted: 10/8/2004 1:53:13 PM EST
The smoke you saw was the animals soul escaping.



Link Posted: 10/8/2004 1:55:59 PM EST
While we are on this, does the bullet actually heat up because of air friction when in flight or would it cool off from air moving around it?
Link Posted: 10/8/2004 2:00:13 PM EST
Link Posted: 10/8/2004 2:02:29 PM EST
Definitely aerodynamic heating going on.
Link Posted: 10/8/2004 2:08:50 PM EST

Definitely aerodynamic heating going on.



I believe this is incorrect. If you read the article the majority of heating is due to friction between the bullet and the barrel.

In one of the photos you can see the very tip of the round slightly heated from atmospheric effects and the rifled grooves very strongly heated from contact.
Link Posted: 10/8/2004 2:22:15 PM EST
Link Posted: 10/8/2004 2:36:06 PM EST
I saw it on a DVD I got free in the mail from the makers of "Tree Lounge"
This one is called "Return to Moonshine Island"
It is an old man and his wife and she shoots three deer in several days of hunting in Georgia.
The film is funny as hell, in one scene she shoots a deer that runs off and dies in a pond. As she is dragging it out an alligator is stalking her and her deer.

On the way in in the boat a snake drops into the boat and she screams and jumps out into the water were the alligators are. Really funny shit.

But on two of the deer she shoots it looks like smoke coming out of the exit hole and as said earlier it may be steam. I think 300 degrees would burn hair and make smoke however.

If you can get a copy and watch these people hunt from their "Tree Lounge" tree stands.

p.s. one of the deer she shot with a crossbow, I think that is the one that died in the pond.
Link Posted: 10/8/2004 2:41:35 PM EST

Originally Posted By gaspain:
The smoke you saw was the animals soul escaping.






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