I'VE been in a debate over bullet dynamics with my son.with new rifling designs how much does a bullet rise after leaving the ba

[6phunter]

I'VE been in a debate over bullet dynamics with my son.with new rifling designs how much does a bullet rise after leaving the barrel?

[pineywoods]

The bullet does not rise at all. As a matter of fact, it begins to drop as soon as it leaves the barrel. If you are shooting over an absolutely flat surface and the bore of the rifle is parallel to the surface, the bullet you fire will hit the surface way out there at the same exact time as a bullet of the same weight that was dropped from the same exact height .
The "rise" of the bullet is when you aim the barrel slightly up so that the bullet will strike dead on at some distance---thus the rise of the bullet might be two inches at a hundred yards to be dead on at two hundred yards depending on lots of variables.

[pineywoods]

There are probably people out there who can explain this better than I just did, but I hope this helps.

[crabwearer]

You said it well piney. I'll just add that if you have a .308 zeroed at 1000 yards, a 168gr match bullet will be 132 inches above line of sight at its highest point before reaching the target. That may be the "rise" that 6phunter was talking about.

[www.dropjhook.com]

heres a link that might help settle your debate with your son =--> http://www.chuckhawks.com/bullet_trajectory.htm

[guamfrank]

Pineywoods is correct. I bullet shot from a horizontal barrel will hit the ground at the same time as a bullet dropped at the same time as the bullet leaves the barrel. Myth Busters on the Discovery Channel did a show on this last year. Bullet rise may come from the fact that a bullet's trajectory is an arc. The link Dropjhook included explains the bullet’s trajectory very well.

[saul6805]

bullets do not rise after leaving a horizontal barrel.