Bruce baers laminate will weigh about 2-3 lbs finished depending on which size you get. He makes three sizes. He is making me a small 1.5 lb butternut thumbhole right now.
For a carry gun think you will find that a 30" is a little unwieldy. I would go with a 28" Broughton with the 5c rifleing. The 5c rifling is faster than normal and will give you the velocity of a 30" normally.
Broughton barrels right now are kicking butt in all disciplines. Sorry to say Dan Lilja has had some bad metal with occlusions in it that pop up in the bore after firing.
I am using only Kriegers and Broughtons right now, but Clay builds one hell of a barrel also and his last one for me lasted 4 yrs and 2300 rounds in match 300 WSM.
I would see if I could get one of the 210 SMKs from JBR on www.6mmbr.com
and seat it where I wanted it and send to Dave Kiff and get my reamer ground min SAAMI and throated for that bullet. If the reamer is ground for the bullet, think you will find that the 300 Weatherby will go over 1000 rounds at match level accuracy, much less hunting. I know mine did.
stock 2-3 lbs
action 2.75 lbs
barrel 4.5-6 lbs
scope 1.5 lbs