I have used the Horn Hunter Mainbeam the past three seasons. I have no problem shooting with it on, and I have killed two elk while wearing the pack. You will not have to purchase a pack frame for packing meat, which is why this is what I would recommend.
I am a small guy, 5'5". The Mainbeam XL is too long for me and sits too low on my hip. If you are looking at the Horn Hunter packs I would take that in to consideration.
From all of the great reviews on the Eberlestock packs on here I gave one a try. I thought it was great, but I still choose to hunt with the Mainbeam.
I have done quite a few 2-4 day trips with my Horn Hunter Mainbeam. I could do plenty more days, but I am going to get the Full Curl system for future pack trips.
The biggest reason I like the Mainbeam is because of how comfortable it is for packing meat. In the past a trip to camp was always required to get the pack frame. The Mainbeam is so comfortable I have not touched a pack frame since I got it. Now that I have used a system like this I will never again carry a pack that will not allow me to take a load of meat out. But that is just my preference.
I have a rack, front quarter, and back straps on the Horn Hunter Mainbeam. I would not have wanted to take anymore, though the pack could have easily handled it.