Whistling bullets

[heron]

Occasionally when I fire a shot I get a bullet that gives a zippy little whistle as it goes off.

What's the cause of that?

[Jack V]

Not an issue that I have experienced but I have heard about it happening. It has to be something about the open nose of the bullet one would think but not necessarily .
If you drill a hole across a bullet it will whistle . It's not a dynamic of projectile flight that I have ever needed to study so you got me .

[KWhorenet]

Nifty invention by pro fox hunter Jim Halloway back in the 70's.

Designed for sub sonic rounds that help keep a fox still and allerted by the noise, not startled.

Who would have thunk it.

[Fujix]

Damaged boat tail or base making it spiral off in some strange way?

Guessing...

[Old Fart]

They whistle when coming towards you.

You sure you're not standing at the wrong end of the range?

[RealNick]

I'm always in the right place, but there are 100 idiots standing a the far end of the range staring at me for some reason....

[1290]

if the whistle has a changing pitch.... then my friend you've experienced the doppler effect. Yup. it was flying past you, a ricochet.
Don't worry, its only a corncern when you are in the path of the ricochet....

[heron]

if the whistle has a changing pitch.... then my friend you've experienced the doppler effect. Yup. it was flying past you, a ricochet.
Don't worry, its only a corncern when you are in the path of the ricochet....

Hi 1290,

Nah it wasn't a ricochet, just an even peal away and have seen some of the impacts.


No one has corrected me so I'm pretty sure I'm standing at the right end of the range too Old Fart

[Manimal]

Some defect in the bullet...

Dented boat tail, thing jacket damaged in the rifling, something making it flight funny,....

[bunnybuster]

They whistle when coming towards you.

You sure you're not standing at the wrong end of the range?

Having spent time in the butts scoring targets of a Big Bore range,you don't hear it coming at mach 2 + only the CRACK as it goes over and the thump as it hits the wall.[ forget all the movie effects s**t,it ain't like that ]

Be Safe BB.

[1290]

agree it must therefore be a defect or shape that disturbs the airflow....

Yes, you will not hear the bullet approaching - hence, if you HEAR it... the danger has passed by

The physics involved is very interesting;

if the target is 1000m away and the proj is traveling at an average of 3000fps = 914.4m/s

Therefore it takes the bullet 1000/914.4= 1.09 seconds to reach the target. For the sound of the hit it will then take another 1000m / 343m/s(speed of sound) = 2.92 seconds for the sound of the hit to 'return' to the shooter.

Therefore, from when you pull the trigger, it will take 2.92 + 1.09 =4.01 seconds for the shooter to 'hear' the hit.

[Westy]

Was it at all like this?????

http://youtu.be/PWiU_HIZ4Jc

[Westy]

Maybe you were using these instead

http://youtu.be/kbRZKrvAZ7U

[Oldbloke]

Having spent time in the butts scoring targets of a Big Bore range,you don't hear it coming at mach 2 + only the CRACK as it goes over and the thump as it hits the wall.[ forget all the movie effects s**t,it ain't like that ]

Makes balistic sense.

What are you shooting?

[Old Fart]

Having spent time in the butts scoring targets of a Big Bore range,you don't hear it coming at mach 2 + only the CRACK as it goes over and the thump as it hits the wall.[ forget all the movie effects s**t,it ain't like that ]

Just joking around

[heron]

Was it at all like this???

Nah no Indian war cries

[bunnybuster]

Having spent time in the butts scoring targets of a Big Bore range,you don't hear it coming at mach 2 + only the CRACK as it goes over and the thump as it hits the wall.[ forget all the movie effects s**t,it ain't like that ]

Makes balistic sense.

What are you shooting?

Paper !

Be Safe BB

[Humir]

Maybe you were using these instead

Great movie

[MakeItHappenCaptain]

Mebbe this?

http://youtu.be/0ABGIJwiGBc

VERY lucky bugger!

[loopal]

That's the kind of thing that makes you never shoot again