The RCM is just an '06 in a short action that'll be a distant memory within a decade, IMO.
The case capacity is the same, so it's no surprise that the velocities are too (except in factory pixie dust loads).
But I've seen your quote before . . . oops, maybe it was
The 284 is just a 270 in a short action that'll be a distant memory within a decade, IMO.
_
