I guess if you include purchasing brass every time... But without including brass in the price, assuming you're reloading the same "quality" ammo, and are waiting till you can find deals on powder/bullets (Which i think is fair, if you're comparing to once a year sale prices on ammo), you should be able to get a .223 rem cartridge reloaded for around $.025 or less.
Buy factory cheap, shoot factory, save brass, reload, profit
Or just shoot a CQB/3-gun match. Lots of .223 brass for the chickens at those things, lol.