I think you will regret building a 7SAUM on a short action. I would strongly consider a medium or long action if you want to shoot the heavy bullets and maximize the potential of the cartridge.
For sale custom Blue Mountain Precision 30 Nosler with long throat.
Defiance Deviant Hunter Long Action.
Krieger 1:10 26"
Manners EH1 Adjustable ADL bottom metal, Flush Cups Left Side and Bottom.
Hawkins Tank Three Port Brake.
Huber Concepts 2 Stage Trigger
Bare Rifle weighs 9 lbs...
I alternate the extreme penetrators and 220 hard casts in the mag of my Glock 20. Underwood ammunition recommends the extreme penetrators for bear protection over the hardcasts.