Ragged Bullet Holes

[bsl135]

Ragged holes at 100,

but not at 200...

First thing that comes to mind is that the bullets are going faster when they hit the paper at 100 yards than 200 yards, about 200 fps difference in velocity.

Could the extra velocity damage the paper more around the bullethole?

I don't know if that's the reason, just an idea.

-Bryan

 

[alinwa]

but not at 200...

First thing that comes to mind is that the bullets are going faster when they hit the paper at 100 yards than 200 yards, about 200 fps difference in velocity.

Could the extra velocity damage the paper more around the bullethole?

I don't know if that's the reason, just an idea.

-Bryan

Seems counterintuitive though, neh?

al

 

[243winxb]

shock wave and/or sonic boom is my guess

http://www.kettering.edu/~drussell/Demos/doppler/doppler.html Scroll down to bullets and planes. Conditions would change with the moisture in the air, wind speed and the distance traveled by the bullet.There have been high speed photos taken of objects like planes and bullets approaching, then breaking through the sound barrier. In these, the compression of the sound waves are clearly shown in the front, with the concomitant lengthening at the rear, just as would be expected by the Doppler Effect. Personally, i dont have a clue.