High speed camera.

[Oldbloke]

Bullets exiting muzzles with a high speed camera.


https://youtu.be/e-R-D_v0udk?si=sRRlIoRGp8JTMXmv

[deye243]

Wait till you see their vids on bullets hitting each other

[Larry]

I didnt see any barrel harmonics but most had muzzle brakes on and the whole barrel was not shown. It did show that a good crown is necessary to shape the shock wave a keep the bullet stabilized.