I consider the WSSM,WSM,some of the SAUM and RUM chamberings a "reloaders" chambering. If you don't reload you find what ammo works for you,and you buy a case of it no matter the expense.
I own 7 of the "reloaders only" chamberings but have reloaded for them since new. This includes some AI chamberings and several big bore thumpers.
To me . . . ammo availability should be of concern before buying the chambering. Especially when some factory ammo is $2-$3 pershot. Try buying factory ammo for a 416Rigby.
Luckily,most of this expensive ammo is for hunting only. I have a buddy that still hunts with a 7WSM. Ammo for his gun is still fairly available. He does not reload but has plenty of ammo and he saves his brass. ---- SAWMAN