I have brass from both .223 Remington and  5.56x45mm M193 Rounds. 

I can't seem to locate dies for the 5.56x45mm.  would I use the .223 Dies set I purchased form DP to reload the 5.56 ammo ?

I've seen a couple forum posts from people that say they use the .223 dies for this, I just wanted to know if there were any drawbacks to doing this of if anyone was aware of a set of dies specifically for 5.56.