Weapon accuracy can be affected not only by the condition of the ammo, scope, and attachments, but also the weapon itself.
Due to a very severe bug you cannot check the condition of a weapon at the moment. I hope this is resolved soon.

They set the FNX's zeroing to 100 meters. This is too far, it's a .45 pistol.

The bullet drop at 100 meters is about 2/3 of a meter. This means the bullet will be about 0.2 meters too high at 50m.

They need to reduce the distance to 50 meters or less, like in ARMA 2.

I like how it is at the moment, this way you can´t easily snipe other players while laying down in 3rd person. Makes it slightly more complicated and adds some "learnable skill" to the game.
But for the FNX and the Magnum I have to agree, zeroing it to 50m would be awesome. Would add some close quarter advantage to those pistols.

Yesterday I took 7 shots at static target who was 8-9 metres away from me. I was kneeling down and using iron sights in first person. I aimed at mass center and took shots with short pauses to let gun level after firing. I missed every single freaking time.

Came here to post a bug and I see that pistol i zeroed at 200m by default. Whow uses 45 at 200m distance? Is this a joke?

Double-checked due to this topic on Reddit:

http://www.reddit.com/r/dayz/comments/1upkjo/psa_pistol_is_zeroed_at_200m_by_default_now/

Handguns are still zeroed to 100 meters, not 200.

Still too far. 50 meters would be fine as in ARMA, 25 meters would be perhaps even better.

I have absolutely 0 problems hitting a zombies head by aiming at it, am I really the only person?

Is this still not fixed?