I have purchased a .300mag and 7mag in the last few years and didn't consider the wsm or rum, mainly because I don't reload and I can get just about anyting I want, where as with the others you are very limited on choices. I also like having the longer 26" barrell, all wsm's I've seen have around a 23" barrell. If your looking for a fast 7mm , I would look at the 7stw, I have one in a sendero and look it. It is faster than the 7mag with out much more recoil. Very comparable to the 7RUM, but does not have the recoil.