Welcome to LRH!
First off, from what I have seen in actual range testing, the 25 WSSM is coming up short of the 25-06 in performance numbers.
Does this mean it is not a good round, certainly not. It is very close to the performance of the 25-06 and thus a great yote/pronghorn hunter though it is a bit tough on pelts with the lighter bullets.
It is alot of gun for a P. Dog rifle and spendy to shoot as well.
If I were you I would start stashing brass if you want to keep this rifle. There is no sign right now that these rounds will not last but they are not selling like hot cakes either.
Get 500 to 1000 brass lined up and that would last a lifetime with one rifle with decent pressure loads.
The 300 WSM
is a great round, little less potent then the 300 Win but totally suitable for anything up to moose on the non dangerous side of things.