This set has been on the block for many years, at least 3-5 IIRC. It even went to auction once.
I think the problem so far has been the asking price.

This Henry action is described by them as "Rogers". It postdates all the traditional Alex Henry invented action production. The Rogers is IMHO not quite as elegant as the Henry.
Alexander Henry was dead at the time of the switch.
As for the .300 Sherwood, it is an elongated .300 Rook, and very close in performance to the .310 Cadet. I think it was a response by WR to Greener.

Best regards,
WC-