22 pounds for a three day bivy scouting trip or hunt during warmer months in Colorado, June to mid-September. Includes three full days of food and a liter of water.
Add 10 pounds for September hunts including Swaro 8x32s, Knight Ultra-Lite muzzleloader, few extra bullets, powder, tools, and kill kit (Havalon, B.O.M.B. Tag Bags, etc.).
However, I don't really consider the weapon to be part of my "backpack," so I'm under 30 pounds for a bivy hunt.
I've been putting all my gear on lighterpack.com I like how simple it is to break everything into category's