RE: Bullet "Rise" - Dispell the Myth
I was with Barnes yesterday when we went to the gun shop. I had Barnes post this because he is a re-loader and he knows a little bit more about ballistics than I do.
I wanted to get a scope mounted with lower rings because the old set-up had see-through mounts and when sighting it in at 50 and 100 yards, the difference of point of impact was pretty different. We posted the problem on the board and we got a lot of explanations on why this was happening. Yesterday when I explained to him the problem with the mounts, he said that it shouldn’t be an issue (that’s another can of worms). We got into a discussion about sighting in scopes and he made a comment that in warmer weather, the heat rising from the ground will cause the bullet to rise (maybe I should of asked him if a bullet sinks faster because of the cold air, just to get a laugh). I don’t know much about ballistics, but I told him that a bullet only rises due to the barrel being pointed up and that it never breaks the plane of the barrel, he disagreed and gave me this air pressure theory and something to due about a vacuum the bullet causes when being fired from the gun. Almost appeared that the bullets he fires have wings and a flight control stick.
Sad thing is, this guy mounted my scope, however, I think he knew what he was doing with the mounting part. He’s one of those guys that work at a mechanics shop and only changes and balances tires; occasionally he may change the oil.