If you are only shooting .223, do not plan to shoot a lot. and are not a fanatic about accuracy, you will probably come out ahead by bying FMJ bulk bullets. There is no question that reloading will produce cheaper and more accurate bullets, but you will find that because you think of them as cheaper, you will shoot a lot more of them. Given the cost of a good manual, a scale, primer seater, bullets, primers, powder, and press of some kind, I expect it will be quite a while before you actually recoup your expenses for these items even if you only stick to the cheapest of the presses and dies.
On the other hand, if you are looking for a way to consume a lot of time (reading and actually reloading) and want a rewarding hobby, there is nothing to equal reloading your own. If you are not careful, it can nearly consume you as you find the need to buy more equipment (lots of options out there), more guns, etc. I speak from over 30 years of experience here; I started with a Lee hand loader with powder scoop for my .357--now I have 28 guns of various calibers and I do not even want to try to figure out how much I have invested in equipment, powder, bullets, and primers.
Moosie