300 RUM back country rifle.

[Bill Ohio]

Ok im wanting to know if this rifle that im wanting to build will have accurate ballistics and knock down power for Mt Goats and sheep. Im wanting this rifle to be very light. id like to keep it around 6-6.5 pounds scoped.

If you want a rifle that's more comfortable to carry as the priority vs. shooting comfort, then you seem to be on the right track. However, everything that really matters is about shot placement. And to be truly expert with any rifle, you're going to need to shoot it quite a bit. At the range, in the field (to simulate hunting conditions and to check zero), etc. Which is why I think you're nuts to consider the heavier-kicking calibers, unless you'll hardly ever shoot it and mostly carry it like any other piece of hiking/climbing gear. I had a Remington 700 KS Custom Shop Alaskan Mountain rifle (or whatever the hell they called it). 6 and 3/4 pounds WITHOUT scope. Chambered in .375 ouch and ouch mangle'em. Fired it four times. A buddy fired it once. Then I sold it. It was a novelty, not a usable firearm unless one defines use as "I will never shoot this until and unless a Grizzly bear is about to kill me, for sure."

I vote for 7-08. Figure 8 pounds with a scope. Forget the brake. I HATE those things; they are a bane on hearing and will lead you and nearby shooters on the fast path to tinnitus.

I think your idea of a 6-6.5lb total weight SCOPED rifle in .300RUM is a recipe to miss.