Re: 7 WSM
You wont be able to find 7wsm either hunting or match at any ol' wally world, but there are good chamberings available to you if you dont reload.
I pick up hunting loads for mine without too much of a search.
As for match ammo, this afternoon at about 430pm, 200 rounds of factory loaded 7wsm match ammo showed up on my doorstep from the boys at CorBon. Its loaded with berger 180gr VLDs and trust me, they shoot just fine. Are they as cheap as rolling your own? Hell no, but they are available. Just order ahead of time.
I love my 7wsm, but as for being a do-all chambering, probably not. I use it as a long range match gun, plus occasional duty for heavier game. My 308 still gets the most use. The 7 is more expensive to shoot, eats barrels faster, and isnt needed for most shooting. It is a hammer, though.