"worth it" is something you have to decide for yourself. I personally don't feel it is worth my time to reload .223 in most circumstances. I don't use the cartridge for its full accuracy potential, so handloading for .223 carries little incentive for me other than increasing it's availability and decreasing it's cost.
I have 2k+ brass, 2k+ fmj bullets, a hornady prep center and LnL progressive, plenty of powder and primers, and after trimming, chamfering, deburring, decrimping, etc...it takes me about 2 hours to load 100 .223 from scratch. I pay $294 per 1k to reload plinker .223 loads, and it would take me the better part of 2 days of full time reloading to go from the components I have now to 1k loaded rounds. With today's component costs and premium bullets, you are easily looking at $400+/1k and longer than 2 days to load for accuracy, as I would use only a single stage. The only way it makes sense to me is if you are loading your own recipe that is optimized for your personal firearm, for accuracy.
Some people cherish those 2+ days for the reloading experience. I think they are a waste of time. .223 isn't fun for me in any quantity, and myself, I'd rather reload another caliber...considering I can go to wal-mart right this very instant and pay $447 for 1k of the same .223 rounds as I can reload for $294. I'm basically working for 16-18 hours to save $150? I can think of much better uses for my time right now during the summer months. 1 year ago I could buy brass cased .223 for $330/1k. At the cheapest I could reload .223 for, I would have been saving $40-$60 for the 16 hours minimum time spent reloading 1k .223 shells.
I cast and reload for many calibers, and .223 is a caliber I don't have much incentive to reload for, I would rather use my time to get much more enjoyment out of reloading for other calibers, and save much more for time spent. So for now, until I absolutely need .223 and can't find it for sale, or until I have access to a longer range than 100 yards and extreme accuracy becomes my goal, I will save my components and purchase .223 ammo, and continue to save the brass.
for every 1k .223 I purchase, I'm saving $75 or so in purchasing brass to reload, and gaining 1k reloadable brass, so that brings my costs on purchased ammo even lower....
Honestly, when I have the energy and gumption, I make $25/hour with my home business aside from my job...when I have the energy to devote, so my time does factor into the equation. 16-20 hours worth of tedious, hand cramping prep and loading that I don't enjoy, to save $150, does not compute. I'd rather just work 4-6 hours to pay the difference, buy .223, and spend my reloading time on other calibers