At the volume I reload 223/556 I have zero interest in separating brass, it would serve no purpose aside from the method that you mentioned. Plus, separating by stamp still doesn't tell me how many loadings are on a case, they could be factory pickups, my reloads are in someone else's pick-ups with who-knows-how-many reloads. So, short of spinning off into organizing at a manic level, there's no gain. Gauging the pockets can be done in a large batch, the bad ones get tossed in the recycle bucket never to be accidentally put back into the rotation. So, while it isn't your method, that doesn’t make it wrong.