What are you using for reloading? I have found that the hornady V-Max Bullets work quite nicely with Hodgdon Varget for powder for the .223. Always be careful when reloading the .223. I use new winchester or remington brass, because the military brass is thicker. The reduced room creates a compressed charge, and it will create dangerously higher pressures if you do not reduce the powder load from what the reloading manuals call for.
Also you will find out that this round will shoot significantly different depending on the weight of the bullet and the twist rate of the barrel. If you have a 1/7 barrel the 60 gr and above work very well. If you have a 1/9 barrel the 50 gr - 60 gr work well, and if you are below the 1/9 then you should not go over 55gr if you want optimal accuracy. The heavier bullets are longer, and need the faster twist rate to stabilize them. If you can use a heavier bullet, it will retain more energy down range.
I love the .223 round. It is allot of fun to shoot, its accurate, and it is easy to shoot well because of the minimal recoil. My daughters like their .223s, and are quite accurate with them.
I plan to take them out this weekend to pop some whistle pigs once we have to stop hunting turkey by noon. Lots of fun and action for the kids!