OK, it's taken me ages to get to the level that I am currently playing at but I'm still only averaging 7-8 kills in a two-round team death match. Yet, I see players regularly getting 15-20 kills! What's the secret? I play patiently, try to bring people down with rifle fire, stick with my team mates, try and get the power weapons but I can't seem to improve.
So, to those that fit this category - can you help?