With current ammo prices, reloading is getting economical when compared to any new production brass-cased ammunition.
As of today, the lowest prices I can find for the following common calibers, for brass-cased new production reloadable FMJ ammunition:
9mm - 20 cents/round
45ACP - 30 cents/round
.223/5.56 NATO - 35 cents/round
.308/7.62 NATO - 65 cents/round
The occasional deal pops up, particularly on the rifle ammunition, where you can knock down the cost by a few cents/round, but not much more than that.
Steel-cased handgun ammunition isn't really cheap enough to warrant shooting it versus brass, but steel-cased rifle ammunition is.
7.62x39 - 23 cents/round
5.45x39 - 22 cents/round
.223/5.56 NATO - 25 cents/round
.308/7.62 NATO - 40 cents/round
If you don't mind shooting corrosive milsurp, you can save even more. I prefer shooting non-corrosive ammo because I'm not religious about cleaning my gun after every range trip. Non-corrosive brass-cased milsurp is hard to find, especially for a decent price. People are selling cases of milsurp 7.62 NATO for $600 when new production ammo isn't much more.
I only buy firearms chambered in common calibers. Currently I shoot 9mm, .223/5.56 NATO, .308/7.62 NATO, and 7.62x39.