Originally Posted by
HEAD0001
It doesn't matter what time the primer pops. All that matters is when the bullet leaves the muzzle. I don't think you can tell that from your video. So you can't count frames to determine the time of flight. Tom.
In that first frame shown here, the bullet has not yet left the barrel, however in the very next frame after, a beginning puff of smoke is the giveaway, that the bullet is on the way.
The next frame reveals the smoke puff growing larger, but the bullet has not yet arrived at the jug.
In the following frame the bullet has just arrived at the jug, and the smoke from the rifle continues to spread.
Several frame later the jug is long gone; the smoke plume grows, and water drops fly across the front of the camera.
In order to learn the time it takes for the bullet to get from the rifle to jug; one just counts frames between the second picture shown above and the first frame one comes to, that shows the bullet impacting.