Thats the same as the 6.5 grendel and 264 lbc basically... all in the same boat with minor variations FWIW.
Nope
6.5PCC is made from a .223 case, just a barrel swap and you are GTG.
Grendel is a 6PPC case with shoulder blown forward .075 and necked up to 6.5, or a 7.62x39 necked down with most of the taper blown out.