Dear Guys,
Thanks for all of the info on this. It sounds to me like a pure "regional" thing regarding which cartridge is more available. In the east, and in other places where there is thick deciduos forest, it sound like the .35 Remington is still a staple. In the west, and in other areas where there is wide open ground, it sounds like the .300 Savage is more available.
With all of the rifles made in these calibers over the past century, I sincerely doubt that there will be a total cessation of making factory loads in our life time.
Thanks, Big Paulie