The 7mmwsm and 7mmremmag are very similar in performance while the 7mmultramag adds about 300fps.Factory loads for the 7mmremmag are available in a great variety of loads so you can usually find one that shoots good in your rifle.Factory loads for the wsm are not nearly as common but there are a few available.Factory loads for the 7mmultramag are very limited and they are very mild.The 7mmwsm and 7mmrem mag produce similar recoil and have similar barrel life while the 7mmultramag produces significantly more recoil and offers significantly less barrel life.In short,for the average shooter the 7mmremmag and 7mmwsm are fine choices while the 7mmultramag is a poor choice especially for a one gun hunter or someone that does not reload.If on the other hand ,your shooting skills are much above average,you are willing to practise a great deal at longer distances to take advantage of the 7mmultramags flatter trajectory, and you are an experienced handloader the 7mmultramag does offer an advantage at distances from around 400 yards and farther.