Is it worth it? - It really depends on your time and your shooting style. If you're shooting style is to spray a whole bunch of lead in a hurry, it is simpler to just buy the ammo. Loading 223 is more tedious than straight wall pistol cartridges since each case has to be lubed, sized, trimmed as necessary, lube removed, primed, then loaded. I know a reloader who loads other rifle cartridges, but will not load 223 because he doesn't think its' worth the time. IMHO - if you're looking to load the cheapest loads you can find with pulldown powder, pulled bullets, mixed cases, etc., you might as well buy cheap plinking ammo and save yourself the loading time. But, it is worth it to me to make high quality accurate ammo using extruded powders and ballistic tip bullets.