Re: 7mm saum
I can not speak for the 7SAUM, but I can say this, a very accomplished Williamsport shooter and gunsmith who built a few rifles for me tried the 300SAUM and the accuracy just wasn't there compared to a WSM, not saying the 7SAUM wouldn't work, If it were me and I was set on a long range hunting rig in a 7MM I would have to go with a 7mmSTW, I was at a friends house last weekend chambering a few barrels and we talked about 7mm hunting rifles and the STW is one of his favorites. He thought so highly of it I believe I might put on together for myself. Of course I'm so sold on 30 calibers because of bullet selection I may not take the 7mm path. But, if I do it will more than likely be the STW.
A 34 inch barrel is just screaming for something more than a SAUM, Maximize the length you have and squeeze every FPS you can out of it.