Stone glacier has a line of military packs. Check them out.
Sounds like you could use a sherpa??K4 all the way. One thing I noticed was a game changer during packout of two bulls and a cow elk this year was that when packing meat/quarters in the load shelf it has its own stabilization/cinch straps separate from the pack portion and the system is simple. So when you buckle your pack down on top of your meat load you don't lose the functionality of your pack accessibility or anything strapped to it like your rifle/tripod AND it significantly stabilizes the load to prevent shifting weight. If that makes sense. Also I ran kuiu for a few years and did a heavy packout (100+lbs) of a bighorn sheep around 20 miles out of the frank. At one point we traded packs so I could see how my buddy's k4 felt loaded down. Came home and sold my pack immediately. I don't know which was worse…how much better his felt or how miserable it was to put mine back on! K4 handles heavy like a dream. Now heavy pack-outs are fun.
I've never had a MR guide lite mt frame/pack get wobbly on me…and I only do expedition distance pack outs. Gutless method butchering in the field, miles of hiking, the whole thing.Thanks. That's awesome to hear and give me a little hope. Exo and Kifaru are both within my price range but the current offerings of bags aren't necessarily ideal for my needs. MR has the bags that fit my needs but I'm not paying $1000+ for a pack that gets wobbly at super high weights. My NICE frame is miserable when packing out a medium sized animal in one trip. Last year on the pack out my ruck weighed 152lbs not counting my rifle and my frame was not happy. I'm researching now (I haven't found anything yet) to see if either EXO or Kifaru frames can be made to work with an ALICE style interface (11"-12" wide) since I have a few bags in that style.