I think the big magnums in general are waning in popularity. The advent of cost effective range finders and quality scopes with ballistic type reticles and/or cost-effective turrets have, "sort of" eliminated the need for a much flatter trajectory. It's speculation; but, I think it applies to many.
Additionally, all of the perceived or actual benefits of the 7 mag come at a cost for little gain over cartridges immediately before it on the cartridge line-up.
I, however, will never be without one.
Last edited by TheBigSky; 10/28/16.