On making 222s from 223 brass, it all depends on the brass used. I did some from lc brass and had lots of problems with wrinkled brass and had to anneal it down into the shoulder but didn't have to deal the necks. I am just making some from Norma 5.56 bràss and they form beautiful without annealing but the necks get very thick and need to be reamed.
Most of my 222 brass is Rem, Win, Starline and Lapua for hunting and target loads but I do load a bunch of plinking, small game and bobcat/fox loads with light loads and use the reformed 223/5.56 brass for them.
