.30 cal bullet temperature in flight

[Jim Horn]

From FLIR. I've never seen the temperatures on a bullet measured in flight before. Wow! Note the heating of the tip, the friction of the rifling, and the base from the burning propellant.

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[SageRatSafaris]

I'm surprised the propellant heats the base more than the friction of rifling does. Interesting.

 

[kmk1012]

That is really interesting, I have wondered about that for a long time. I'm sure less pointy bullets heat way more up front.

 

[Flopsweat]

That is really interesting, I have wondered about that for a long time. I'm sure less pointy bullets heat way more up front.

A similar study (or maybe this one?) lead to some manufacturers changing the shape and/or composition of their polymer tips.

 

[PiratePast40]

For those, like me, that have a hard time making those conversions in their heads:
velocity = 2624 ft/sec
Tail temp >932F
Groves temp = 572F
Nose temp = 338F
Body temp <122F

 

[po18guy]

Edit: NASA is constantly concerned (or should be) with the ceramic tiles on the shuttles. I see that shuttle re-entry speed is 17,500 MPH/about 25,600 FPS, so a 'tad bit' more heat generated there, even in the stratosphere. Nevertheless, we are nearer sea level and so the air is generally pretty dense.
Decades ago, I think it was Skeeter Skelton or Jon Sundra who loaded some 30-40 grain 22 Hornet varmint bullets into a .220 Swift at max velocity. He noted some smoke about 25 yards from the muzzle and soon realized the the bullets were powdering from the heat and air resistance.

I made a comment about defensive bullet cauterizing the wounds, but also wonder if you shot small enough game with a heated bullet, would it be fully cooked by the time you reached it?

 

[Flopsweat]

Edit: NASA is constantly concerned (or should be) with the ceramic tiles on the shuttles. I see that shuttle re-entry speed is 17,500 MPH/about 25,600 FPS, so a 'tad bit' more heat generated there, even in the stratosphere. Nevertheless, we are nearer sea level and so the air is generally pretty dense.
Decades ago, I think it was Skeeter Skelton or Jon Sundra who loaded some 30-40 grain 22 Hornet varmint bullets into a .220 Swift at max velocity. He noted some smoke about 25 yards from the muzzle and soon realized the the bullets were powdering from the heat and air resistance.

I made a comment about defensive bullet cauterizing the wounds, but also wonder if you shot small enough game with a heated bullet, would it be fully cooked by the time you reached it?

You need an AR15 for that.

 

[po18guy]

You need an AR15 for that.

Tried a 9, but it only blew a lung out.

 

[Flopsweat]

Tried a 9, but it only blew a lung out.

You probably forgot the shoulder thing that goes up.

 

[Xmark1]

Tried a 9, but it only blew a lung out.

 

[po18guy]

You probably forgot the shoulder thing that goes up.

You know...the...THING!

 

[ditchtiger]

A similar study (or maybe this one?) lead to some manufacturers changing the shape and/or composition of their polymer tips.

I remember that. A radar was used to track the bullet in flight

 

[Yarome]

You need an AR15 for that.

That wouldn't work at all. A single round from an AR15 blows a human sized body in half and will completely decapitate a head. There wouldn't be enough bullet dwell time in the body to measure the rate/degree of cook capable.

 

[po18guy]

That wouldn't work at all. A single round from an AR15 blows a human sized body in half and will completely decapitate a head. There wouldn't be enough bullet dwell time in the body to measure the rate/degree of cook capable.

Just talking about it fried Biden's brain.

 

[Flopsweat]

View attachment 1869906

In addition to knowing nothing about guns, this ahole doesn't know jack about PTSD. PTSD is a disorder. You don't have it for a few hours or days. The "temporary form" of PTSD is PTS ya frikin' halfwit.

 

[Yarome]

In addition to knowing nothing about guns, this ahole doesn't know jack about PTSD. PTSD is a disorder. You don't have it for a few hours or days. The "temporary form" of PTSD is PTS ya frikin' halfwit.

Poor baby bwoosed his widdle shoulder... awwww....

"Kuntzman". That explains a lot.

 

[gmerkt]

Strangely enough, I've never wondered about the temperature of my bullets while in flight. As long as they got "there" was good enough for the moment, I guess.

 

[quneur]

The next time someone uses an AR-15 for defensive purposes, they should question their assailant to rate their experience concerning the heat of the projectile during flight: (1) did not significantly contribute to the seriousness of their wound to (10) significantly contributed to the seriousness of the wound.

 

[Howard1955]

Some of those heat-seeking bullets will cook the deer for you. That's pretty hot.

I know this is a fact, because a lady politician said it is.