Weapon fails to zero correctly

[GenShineySides 0]

Okay sounds weird I know, but for sometime now I have noticed that my weapons "which are not sniper rifles" are not zeroed correctly . For Instance everything I use that is not a sniper rifle I am having to aim high. For Instance M16 ACOG, it's zero is 300, in order to hit 300 I have to put the thick black part of the bottow hair on the cross hair on the target. I've messed around deleteing all my DayZ files, when that didn't work I deleted all my Arma2 files and reinstalled, that did not work as well. Its actually getting me killed alot, and I want to say I noticed it with the 1.7.5.1 patch released, just never had an issue till I changed up my tactics and used different weapons. My game group and I have no idea what could cause it, two of us linked up both with m16Acogs to compare and its looking like shots at 300M are coming up 20 meters short. Have tried standing, kneeling, Prone. Anyone with any ideas please let me know, I have a video, might post it on youtube.

[Lupatchi 143]

im pretty sure the stock standard zeroing for all rifles is 400

[sirlinc 0]

how did u even get the damn game to work lol all the servers are red for me

[GenShineySides 0]

Seems had my facts wrong, problem solved