Ok thank you for the info. Do you (or anyone else) feel that the 6.5mm saum would be better off for overall length in a long action than a short action? And thank you for the bolt face info. I wasn't positive if they ran the same face as wsm but thought they did.I am looking for folks with first hand knowledge of this as well, but the last few weeks of research
have led me to my current conclusion that while it may be possible to run a 7mm SAUM in a short action loaded with Berger 180s, it will be less than optimal. My reasoning is that in order to get COAL down to the range where it will feed from SA magazines, the 180s will have to be seated deep enough to either intrude on case (powder) capacity or have the beginning of the ogive below the case mouth (more likely, it will be both).
Either way, IMO it makes more sense to go with a long action for that chambering, because at that point you'll have enough room in the magazine for whatever bullets you like seated to whatever COAL works best for your specific rifle.
Regarding the bolt face, the SAUM and WSM cartridges both run a magnum bolt face.