Good info.
I think 220 fps puts the PRC in another category from the CM.
The 6.5-284 with 140's, according to Nosler data, has 58.4 gr H2O case capacity.
So, the new PRC will be real close to the SAUM and in a SAAMI round with first class brass.
Hornady doesn't make many mistakes, they're not Remington...
DF