I bought a Mystery Ranch Nice 6500 pack and used it on a sheep hunt in Alaska in August. I am wondering if anyone else has noticed when you load this pack up with 60-80lbs that it becomes unstable. I was getting tossed all over the place comeing off the mountains with mine. Any ideas on what i may need to do or adjust or is it just how it is. My guide and the other hunter in camp were both using Barney packs and were getting along fine.