in g.r. world, ak47(7.62x39mm) vs. m16(.223cal)

[462cid]

I saw a few posts here saying 5,56mm shoots streight and has low bullit drop.. now a friend of mine who was in the South African army (they use 5,56mm Vektor R-4, a Galil clone) told me that when shooting in savannah or in bushes, even a contact with thin branches or tall grass blades can change a trajectory of the bullit...I have very little expirience with 5,56mm..so any comment on that?

I have one

I didn't read all the replies, so this may have been covered, but I have a book by a man who was injured very badly in Viet Nam, named Frederick Downs, jr. In addition to being a hell of a brave guy, he is a very honest and open writer. The book is 'The Killing Zone', and it's a good read.

Anyway, in it he recounts that in 1967, all of his men had M16s, but one of his

point men had an M14- mostly because the heavier bullet wouldn't get deflected so much by a branch or twig.

Edited March 15, 2003 by 462cid

[Copenhagen]

the round was renamed to .223 winchester

.223 Remington

And the round was never "renamed". Remington made/invented the round. They had the round before NATO adopted the cartridge, so they didn't "rename it".

Edited March 15, 2003 by Copenhagen

[WhiteKnight77]

If a round doesn't rise, then all the instructors at the militaries rifle ranges are wrong. The are wrong for teaching me to aim low to hit the center of the target at 200 yards. Aim where I want it to hit at 300 and aim high at 500 so it drops into the center of the target there. Now I am fully aware that sights are adjustable and did adjust them. I also have used windage due to a crosswind. Most here have prolly do not have any military experiance and thos that do can relate to what the range instructors have told them. The rest of the shooters here don't shoot at those ranges I have listed above. Some ranges are even measured off in meters which make the shots even further. If I had aimed dead center at the 200 yd line, my rounds would have never been in the black or if they were, they would have been at the very top. A perfect score in the Marines is 300. I generally scored in the 280+ range which is Expert.

Rounds rise as I said earlier.

[redneck]

The are wrong for teaching me to aim low to hit the center of the target at 200 yards. Aim where I want it to hit at 300 and aim high at 500 so it drops into the center of the target there.

Nope, this does not contradict anything I - or Galileo or Newton - have said.

Draw a shallow curve on a piece of paper, about five inches long and, from left to right, rising about a half inch before falling back. This represents the trajectory of a bullet. The way your rifle was sighted, the top of this ballistic trajectory would be at around 200 yards. Draw a vertical tick at that point and mark it "200 yards."

Now, moving further right, estimate where 300 yards might be and make a vertical tick, labelling it accordingly. Note that the bullet trajectory crosses this line lower than it does at 200 yards. Where the trajectory and the tick intersect represents the centerline of all the targets.

Moving further to the right, at an estimated 500 yards, make another tick and note that the trajectory is below the target centerline.

So what happens when your rifle is sighted at 300 yards is you point it upward enough that the bullet travels upward, reaching its apogee at about 200 yards, then falls, hitting the 300 yard target in the center, and continue to fall as it hits the 500 yard target below center. With your rifle sighted in this way, you can hit 200 yards by aiming below the target, and 500 yards by aiming above it.

Now, here's the important part:

o You can consistently change the point of impact by moving the target up or down in your sights, because in doing so you do not change the chape of the curve.

o However, changing the sights changes the curve because it changes the angle at which you will hold the bore of the rifle.

All that aside, just think about it: the bullet cannot rise against gravity unless there is a force pushing it up. Lacking an airfoil, the only force available must be the ballistic vector, ie, you are pointing the rifle at an upward angle.

Edited March 15, 2003 by redneck

[Zantar45]

Copenhagen Posted on Mar 15 2003, 18:07

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QUOTE (Zantar45 @ Mar 15 2003, 07:46 )

the round was renamed to .223 winchester 

.223 Remington

Oops, I mistakenly put winchester, thanks for correcting my mistake.