[possible bug] Cant headshot if range is on the mid-long range

[Tacti-Cool 10]

the intervention was NOT designed for engagements at 100m or less, you can see it in your video, how far up your muzzle is going from recoil, your bullet is going over his head as soon as you pull that trigger.

[[frl]myke 14]

no myke sorry. although gravity applies for anything regarding mass on this part of the universe, if something is tossed with enough energy it will keep going fighting with gravity (or we wouldnt have gon to the moon, you'll agree).

When we talk about rifles and calibers there are a few parameters we need to know. One of these is the straight flight path, i.e. how much far the bulle will go before losing power and thus starting to drop. If a rifle has a 300m straight flight trajectory, it means that the bullet will go straight from the tip of the barrel up to 300m, so it's no use zeroing for any range less than 300m and consequently there is no need to compensate (i.e. raising your aim to cover up for the gravity drop).

The video we can see makes no f***ing sense.

I have a sniper rifle that, even without comparing with its supposed real life counterpart, should at least be able to have a straight flight path of 500m.

I have a sight zeroed at 500m.

AND I CANNOT HIT A TARGET AT 100m if i dont zero at 300m.

WTF?

Please someone help me understand this. It's geometrically impossible.

Please don't take this offensive but maybe you should read these 2 things first: Gravitation, External Ballistics (Chapter: Bullet drop)

It will help you to understand what happens and why it happens.

[ProfTournesol 956]

no myke sorry. although gravity applies for anything regarding mass on this part of the universe, if something is tossed with enough energy it will keep going fighting with gravity (or we wouldnt have gon to the moon, you'll agree)

You missed some physics lessons, didn't you ;)

[Cathrynn 10]

Maffa: If there's a monkey in a tree 100m out and the monkey drops out of the tree at the exact same time as the hunter fires his rifle at the monkeys head, will the bullet hit the monkey? The answer is yes because the bullet drop's the same amount as the monkey does.

[maffa 29]

Sorry to be pedantic, but look at the graph at your own link

following the trajectory graphs for the M16A2, it says that with a point blank zeroing, the trajectory goes as up as 25 centimeters at 100m to fall again at 0 at somewhere short of 350m, isnt that right?

Isnt that what i called "a straight trajectory up to a certain distance" ? Obviously this doesnt mean it's a laser beam, but as far as bullets are concerned it's as straight as you can get, i suppose! I mean it has a 20 cm tollerance at worst and i can see the face on more than 50% of the sight and i cannot hit the face of the guy!

Edited October 28, 2013 by Maffa

[Greenfist 1863]

There's no straight line in that graph.

And it's not "point blank zeroing" but zeroed at 300-350m. So if you'd aim at someone's eye at 200m, the bullet would go 20cm over it and probably miss his head completely.

Now if you'd zero the M16 to 500m, the bullet would pass the target at 200m even higher (maybe 40cm above, I guess).

Edited October 28, 2013 by Greenfist

[Sniperwolf572 758]

Sorry to be pedantic, but look at the graph at your own link

http://upload.wikimedia.org/wikipedia/commons/d/dd/M855_drop_during_25-meter_zeroing_trajectory_M16A2_M4.jpg

following the trajectory graphs for the M16A2, it says that with a point blank zeroing, the trajectory goes as up as 25 centimeters at 100m to fall again at 0 at somewhere short of 350m, isnt that right?

Isnt that what i called "a straight trajectory up to a certain distance" ? Obviously this doesnt mean it's a laser beam, but as far as bullets are concerned it's as straight as you can get, i suppose! I mean it has a 20 cm tollerance at worst and i can see the face on more than 50% of the sight and i cannot hit the face of the guy!

First off, does the graph look like it's a straight line? Nope.

The M16A2 in that graph is zeroed for 25m near zero and approximately 340m far zero. Far zeroing is what you are adjusting in Arma. Now imagine you are firing at noses of targets at 25m, 200m and 340m with that M16A2.

You'd hit them at 25m and 340m but 200m the bullet is almost 25 centimeters upwards of "zero". It's not possible deviation, it is it's peak altitude for the 25-350 zeroing.

Now, average human skull is also around 25 centimeters in height. So if you are shooting at the nose, your bullet will fly over the head of the 200m target by around 12 centimeters.

Additionally, imagine a situation where you were on the ocean with a rifle. And you're standing with a handgun on a platform that's 2 meters tall.

If you fired the handgun parallel to the ocean and dropped a bullet from the same height the bullet was fired from, they'd plop into the ocean at the same time.

Edited October 28, 2013 by Sniperwolf572

[ceeeb 147]

This script could be helpful to the thread author: http://forums.bistudio.com/showthread.php?164294-Quick-and-fun-projectile-path-tracing!

[Greenfist 1863]

This script could be helpful to the thread author: http://forums.bistudio.com/showthread.php?164294-Quick-and-fun-projectile-path-tracing!

The ultimate tool for studying bullet trajectories, speeds and penetration. Also helpful for learning about AI weapon usage.

[Sniperwolf572 758]

Anyway, this should clear up the diagram. Here's a human head placed with nose in crosshairs for my example above. Head height is approximately 25cm on the vertical axis. Ignore the horizontal axis as obviously a head isn't 50m wide.

[maffa 29]

it must be so because this is what happens in my attempts.

i will keep it in mind. thanks.

[SaBrE_UK 0]

And you have adjusted for bullet drop?

So Indeed you were right ;)

But it does go to show how there is a steep learning curve for many people. I guess people do find these things out as they go along, though, and obviously patient community members can help. I wonder how many people try things such as the OP, believe it is not working correctly, and label the game as junk. Maybe the game isn't for those people but I wonder if BI can do anything. Dsylecxi's community guides go a long way but an in-game solution may be of benefit to many.

Edited October 29, 2013 by SaBrE_UK

[maffa 29]

sabre believe it or not im not as new as that. If you look at the situation, it's just a very peculiar situation, and it doesnt really have to do with bullet drop rather than with zeroing (which is of course a way to cope with bullet drop, of course).

It never occurred to me in game that there was a range were i couldnt hit a target because of the bell curved trajectory would have the exact height of a head.