The 224 ARC/Predator/LBC/PPC AFI are all birds of a feather and shoulder position is well shy of moot. Hint.
I prefer said chambering,because it will shoot higher BC's with greater velocity,than it's .243" Cousin(s). Doubly so in a Krunchenticker's mag confines,though ASC's are forgiving and obviously my default favorite. Hint.................