OK i give up. Im totally lost now. Seems that after putting this line in mouse acceleration stoped. But seems that mouse sensitivity is changing while playing. I don't understand it. When I got into the game it looked like everything is fine, but after few minutes of playing i tested again and now i was doing 390-410 with my 27,3 cm. Played few miniutes again and again I was making 360 in 27,3 cm. Tested with mousepad and witout. Same strange results. Then i went to Apex and checked if its the same there, but nope. Every time i turn around it's egzactly the same discance. So or game have some strange bug or I don't know what is going on. Anyway thank you for your help and sorry for my English. Will have to play as it is.