Rancen

I cant even hit the target on distance of 20-30 m from me. Bullets fly in any direction except straight direction. WTF??? Because of this the game is absolutely unplayable. I have maded some tests and find out that problem in bin.pbo file (wrong weapon tuning?). When I changing it on bin.pbo and arma.exe of 1.00 version, then weapon accuracy working right, but perfomance goes down. Anybody found a fix for this weapon bug?