It used to be that reloading 9mm was barely cost efficient. You could often buy plinking ammo for less than, or equal to, the cost of reloading. Today, not so much. I was surfing the web yesterday, and the only 9mm ammo that I could find (115 FMJ) ran $0.66 per round. If you can locate the components (or already have them), especially primers, go for it! I personally prefer 124 grain bullets for a variety of reasons.