I've been using a gunslinger 2 for a couple of years and I am about to get rid of it. If you weight it down at all, it gets uncomfortable. I typically have around 30-40 lbs in it including my rifle and it wears on me. I think it is a flawed design. When you compare it to a true backpacking harness like on a Kelty or Kirafu pack there is a huge difference. On the Eberlestock, the load straps are useless because they are in the wrong place. They should be angled up at about a 45 degree angle, but they are basically at a 0 degree angle (parallel to the ground). One you load up the pack and put on the waist belt, the weight of the pack wants to fall backwards. I think newer models have some sort of frame in them, but I dont know if it makes it any better or not. I think after my hunt this fall, I am going to look for another pack. The only thing is finding one that has a scabbard built in or some type of system to carry my rifle.