I have handled salary actions for direct reports for a while and I have no problem with someone trying to make an objective case that they deserve a raise. In my opinion there are two things that can help you, assuming you don't report to a jerk:
1) Provide data showing that you are paid below market for your skills and performance.
2) Don't be aggressive. It's annoying. Try to frame the discussion in such a way that puts your boss on your side in trying to get you a raise. This can require some effort in a larger company, especially if it is out-of-cycle. Be patient while he or she handles it.