Grendel case neck splits - solved

[Fess]

I have a vague recollection of some issues very early on in the Grendel's life with the junction from the neck to the shoulder. The Grendel uses a much tighter radius than typical (about half that of the 6.5x55, for example) and some people had chambering issues. Has this become a non issue with modern neck bushings? I have never dealt with them, so I don't know if 6.5mm neck bushings are generic or ground specifically for a particular cartridge design.
Thanks