I'm just now getting into load development for the .223. I've been reloading 6.8 SPC for probably 7 or 8 years. I stocked up on .223 and 5.56 when ammo was cheap so I really haven't had to do a lot of reloading on that. But I started when the ammo went up and now I'm just doing it for better accuracy than just cheap shelf ammo.