I keep reading about how the wsm's don't have anything to offer that hasn't already been offered by the equivelent belted mag and they will be a dieing breed. Having owned belted mags and wsm's. I find this hard to believe.
This is a fact. The 300 wsm does not have better balistic stats than a 300 wm nor does the 325 wsm have better than the 338 wm.
What the 300 and 325 wsm's do offer is. The ability to perform with similar or identical ballistics. The 300wsm up to 180gr. The 325 up to 225gr. In a lighter and shorter rifle with 10% less powder usage and noticeably less recoil.
Shorter lighter barrel. Shorter, lighter action. Shorter, lighter round. With equivelent ballistics and less recoil. I would have to say that is quite a big offering.
Yes, if you need a 200gr in your 300 or a 250gr in your 338. The wm would be a better choice for improved balistics.