: Ensure your video settings are set to OpenGL via the in-game menu; this is the only mode that supports stable frame rates and accurate hitboxes according to The Definitive Guide to Performance .
rate 10000
: Setting ex_interp 0 or ex_interp 0.01 is a common "trick" used in aim configurations. This command forces the game to calculate the most accurate position of enemy models based on the server's update rate, reducing the "ghosting" effect where you shoot a head only for the server to decide the player was already slightly further ahead. Cs 1.6 Cfg Aim Headshot