I have a 7mmultramag,two 7mmstw' s and two 300ultramags.I prefer the 7mmstw' s as the 7mm ultramag gains very little velocity for all the extra powder you have to burn.The ultra mag case is more suited to the 308 and larger bores.I do however find that the 7mm bullet driven at stw or ultra velocities is my favorite for deer,sheep or pronghorn.