Here's what I figure 9mm costs to reload. First I don't count the cost of brass as you can pick up all you will ever need at ranges.
115 gr. West Coast plated 9mm is .041,powder = .01, primer = .012. Total cost is .063 per round. You can lower that to .046 per round if you use lead bullets. The cheapest loaded 9mm I have seen is about .098 per round.