Neck UP 204 Ruger brass. 204 is based off of the 222 Magnum.
I built a 222 Magnum AI (a.k.a. Super Duece) AND....went extra, extra deep with the AI reamer and created 223 Feisty.
204 Ruger brass is a lot cheaper than 222 Mag headstamped brass as well.
Remington brass has been FAR superior than Winny. Win will provide you with split necks after the 1st, 2nd, and 3rd firing....by that time, you will have half the amount of brass you started with originally.