I packed out a caribou cape and antlers and was good to go. For camp/hunt trips I also employ the spike camp duffle and super spike duffle to get lots of gear to camp. I bought the strap extenders for the main compression straps as with a full spike camp duffle and main compartment, the straps on the pack are a little to short. I also went with the extra large waist belt to move the molle straps further forward, and it has LOTS more padding than the stock waist belt, but you have to be in the 38"+ waist range to make it tighten up good as its longer in the padded area..
I chose the j34 over the j107 due to width, I wanted a narrower profile for hunting with it on, although if a guy is planning to use his pack for lots of heavy hauling the j107 with the heavier frame would probably be better. 70#-75# is pretty much the limit for me. I think the pack will handle more but my old bones just won't git r done anymore...
Have been thinking of selling the j34 to downsize further (lighter) into a better daypack as I think my backcountry hunts are about behind me and I bought a really neat and very light Simpson Capstan winch that I have hauled two Rosevelt Bulls with at the same time up a very steep ridge in the Oregon Coast Range, guts/feathers and all.....30'/min. and sips fuel but the cost makes the packs look cheap.....8 hours behind the winch beats 8 hours making trips with elk quarters any day of the week.......
No matter what, I am sold on the Eberle packs as a great value, the quality seems first rate, they are comfortable and adjustable, and whatever I do it will have Eberlestock stamped on it....