RE: 243 WSSM ???
I think you got it figured out. Buy quantities of the ammo now, while its still in steady production, and before the prices double on it.
The bolt action market for the WSSMs is a done deal. The only thing keeping them alive is the AR platform.
I have a 25WSSM, and I like it. It ain't nothing special though. Be a darn good beginners deer rifle, as there is no recoil.