bullet trajectory

[horsepwr]

So I was having a conversation about bullet trajectory, and the guy told me that bullets rise after leaving the barrel. I replied, "negative ghostrider". He told me that his dad showed him this on targets from 100 to 300yds, and that after his dad "shooted", the targets showed the bullet higher at 200yds than the 100 and 300yd targets. The rifle used was a .270.
Now, I was, and am, just basing my argument off common sense geometry, that a bullet will not rise in flight. There should only be 2 things that effect the bullet in flight. And both of those, that6 I'm aware of, only force the bullet to drop. (air & gravity) Creating drag and drop. Unless the rifling somehow creates this 'bullet rise'...I just don't see it happening. If that were the case, the rifling could make the bullet turn corners.
Am I wrong? Is there such a thing? I'm no rifle expert. I've never even been a long distance plinker. no deer hunter. But I understand bullet trajectory. I think.

[JsJs24]

Re: bullet trajectory

Am I wrong? Is there such a thing? I'm no rifle expert. I've never even been a long distance plinker. no deer hunter. But I understand bullet trajectory. I think.

I know a man who is one of the top long range (500-1000 yds) iron sight gun shots in the country. He explained to me that he has to aim higher at longer distances and has to compensate for bullet drop. This part is pretty obvious though, of course you would aim high at very long distances. The person you are debating this with has to be wrong. Think about it like this. If I have a .270 deer rifle, and I shoot open sights at 100 yards or less by aiming directly at the target, and hit somewhere around the bulls eye or a little low, then obviously there is no rise in the bullet. The bullet leaves the barrel and immediately faces drag, thus slowing down the flight of the bullet. Additionally, the bullet is being pulled down toward the earth by gravity at a constant force. Therefore, the bullet is decreasing in velocity and dropping in altitude throughout its flight.

[rc10j1]

Re: bullet trajectory

It's not that the bullet is rising, it's that your trajectory is aimed upwards. If your scope is sighted in at 100 yards, your trajectory is slightly above level for the arc of the trajectory to intersect the paper at 100 yards. Gravity begins dropping the bullet as soon as it leaves the muzzle. Depending on the round, I have over a 10' holdover at 1000 yards.

[horsepwr]

Re: bullet trajectory

Just the man I was looking to hear from. Or men. sorry.
I received a phone call about mid-morning after posting this. It was the fellow that told me I was 'dead wrong' about bullet rise. Which kinda got under my skin, especially being the savant used "shooted" 3 times during his explanation of "deddy" and his .270 & "bullet rise".
So, the call was letting me know that he was very young when his father told him about the bullet rising, and he'd never thought of it since. Which makes sense. He realized that there no possible way, but the dude repeated my argument in his explanation of why the bullet hit the 50yr. (yes, correction. It was 50yrds that the bullet hit higher). But, he went on to explain it had to be the result of the scope being mounted a couple inches above the barrel, so it rises because of the scope sighted in at 200-300yds, whatever...so when it crosses axis of the barrel to line of sight, the bullet rises. Basically, he figured it out.
I appreciate the verification of my thoughts on the subject.
No wings or force of propulsion once leaving the barrel, so...only forces of drag and drop. Only way a bullet can rise is by the direction of the barrel pointed upwards. A bullet can't rise above the barrel's axis though.

[ketsugo]

Re: bullet trajectory

Now this is cool shit....................