It's hard to categorize or explain, but I agree with Rellik here. I guess I would say though it isn't lag and is maybe shot registration. It seems to come and go and can be pretty frustrating when it's happening often. It's like some rounds I can unload an entire clip in a guy and hit nothing, then the next round everything works as it should. Again, it's only very slight 'delay' or 'lag' but it's noticeable when it's happening.

Maybe a server reboot is in order.