I've already got the dies and components...but have not started reloading for it yet. I think .223 will be the 4th cartridge I learn to reload. I am starting with .45 auto, will try out 9mm too and then jump to .308 win.
The reason I think it is worthwhile to reload is I did the math and even with regular-priced (non-bulk) components, a box of 20 can be produced for $4.65 and can get down to near $4 per box if I scour sales ads or order in bulk.
The cheapest brass-cased ammo I have seen lately is $7 a box. I just bought 1000 for about .32 per round to start stocking up on brass. Sometimes the cheapest stores have is $8 a box. I can find steel-cased for $5 occasionally, but it is getting rarer, and more often than not, even that is $6 a box usually. And I just like shooting brass better. Something satisfying about the jingle jangle as they hit the floor.
So, say $3 savings per box, that's $7 or $8 savings per 50. Not quite the great margin of reloading .45 auto (I have figured a savings of at least $10 per box versus factory) but still pretty good.