I've seen guys at the range with factory 223 5.56 ammo, their done shooting, I go over and be a brass rat, and a lot of them have split necks.
Pressure in a wide case comming out a little opening that is not close the the case width, is going to create stress on the neck and shoulder of the caseing.
I had factory Federal 30-30 ammo given to me, because my buddy bought the wrong grain. I shot the box, and 5 out of the 20 had split shoulders when I picked up my brass.
The brass manufactures are cranking out as much brass as they can, so the quality has diminished severely over the last 10-20yrs.
So you will get culled 1 time fireing pieces, 3 reloads is about right for 5.56 .
Just remember every time you fire a round, you weaken the case, annealing only puts a bandaid on the weakening case.