I have a 300 rum based off a model 70 classic magnum action, William's SS Oberndorf BM, 25" #3 Rock, Talley LW and a Zeiss conquest 4.5-14. It weighs just a hair over 8lb.
That's about what I am going for. I'd be happier than a clam for it to come in under 9. I am keeping the Supergrade 1 piece metal for now.
