Wild Bill,
I am no expert on fit. I think there are different sized belts and I have a medium, I think. I did have a Marine friend help me with set up but there are instructions on the net. I try to get the pack snugged up to me and to the point where I feel the weight on the small off my back and not my shoulders. I am posting a few pics of the pack in use from a couple of hunts and training trips.
[Linked Image]


[Linked Image]


[Linked Image]


[Linked Image]


[Linked Image]

[Linked Image]


As I said, I can't give expert advice, just relate my experience. I have not tried the more expensive dedicated hunting packs and I am sure they are great, but I have no complaints with the ILBE. It'll get the job done and then some.

HD