I have 2- 7 SAUMs, Nosler brass just plain sucks! Remington Brass is much better, but near impossible to find. I,m trying the Norma 300 SAUM brass necked down now. time will tell
I’ve been replacing barrels and brass every couple years on my 7mm R/Mag waiting for something better to come along. I’ve had my eye on the 7saum out of a long action but brass is nearly impossible to find. In the meantime I’m staying put. 7mm R/mag brass is reasonably priced and plentiful and until someone builds a better 7mm mousetrap with plentiful/reasonably priced brass I’ll live with the belt.