Seems to me the 7RM filled a market niche and satisfied a
need, or at least a perceived need.

The .264WM from the beginning was a high performance, specialty item, whereas the 7RM seemed more mainstream. And, to me, the .264 was more finicky than the 7RM, which was easier to load for and more forgiving.

I know, .264 advocates have tweaked that round into some impressive performance, but history is history and the 7RM blew the .264 WM away in sales. Maybe the public wasn't yet ready for the 6.5 bore. Who knows. The 6.5 seems to be moving slowly forward these days. I have and like both calibers.

DF