I had a bunch of 5.56 and was informed not to use it in my .223 so I pulled all the bullets and was wondering if I could use the primed cases or if they need to be resized or anything? I picked up the Lyman manual, a LEE hand press (don't laugh I don't have much room) some LEE dies and will be using Hornady 53gr hp match bullets and Benchmark powder. If they need to be resized I would assume that the primers need to be fired so I could just chamber the shells and pull the trigger?

















































