I can't be 100% sure on this, but I think it has to do with the never ending quest of the "Magnum" cartridges. It's also the same reason why so many hunters now opt for the larger .300 Win Mag and come to a strange conclusion that.... "the 30-06 cannot get the job done anymore" How they have came to this conclusion, I have no Idea.

I personally enjoy the "mild" cartridges. I do own many magnums also, but that does not mean that I think the other rounds are inferior.

I wish the .257 and 6.5's would become popular again and be offered by more gun makers.....but I guess they have to go with the current demand.