Well. My cod4 KDR isnt very accurate. I spend way to much time killing myself on purpose.(and accident >.>) Even with my 500 something self kills, it comes out to about 1.6
EDIT: Sorry that was my secondary account i didnt do the math, but heres stats: 58,217 kills /45,462 deaths. Ive played for 13days and 8hours, 5731 headshots( I unlocked all gold guns), 727 assists, best kill streak 37 ( i dont camp enough >.>), and total score is 628281
Ive completed all teh challanges unless it required a non-hardcore game mode.