I'm going to offer slightly different advice than 5 shot. I bought my Eberlestock Dragonfly on clearance last year about a month before I left for a 2nd rifle elk hunt. When I got it out of the pack, my initial reaction was 1) it's huge and 2) it's heavy. I wasn't sure if the weight cost of the rifle scabbard would be worth it. I nearly sent it back, but for the price I paid I figured what the heck - give it a chance and if I didn't like it I could probably sell it for what I paid.
Well, after 10 days and countless miles, I fell in love with that pack. No, it's not a lightweight pack, but it carries MUCH lighter than it is - to me at least. Not sure what it is about the shoulder straps and hip belt, but they fit me like a glove. No other pack I've ever worn is as comfortable to wear. 30# in my Dragonfly feels like 20 in any other pack. Also, I fell in love with that rifle scabbard. What a brilliant feature.
Having said that, I read all the reviews here about other packs and couldn't get my mind off of the Mystery Ranch Pop-up 28. It just looked like the handiest thing ever. So I ordered one on father's day sale and figured it would replace my Dragonfly pack. Immediately I didn't like the way it fit. The pad in the center of the small of my back just felt odd the whole time. I weighted it down and it still didn't feel right. I made countless adjustments to it over the course of a week, took it on hikes, etc and still didn't like it. I also didn't like how far from my back the pack sat when I loaded my camp gear in my spike duffel on the overload frame. So off it went. Sold the pop-up for what I paid for it to a member here. Still have the Kifaru Gun Bearer that I had intended to use with the pop-up.
I've happily gone back to my Eberlestock Dragonfly and will use it again this year. I did buy the spike duffel (which I love and use all the time now) and my camp fits in there and it fits perfectly inside of my pack with the wings open.
I always bring a pack frame for hauling meat, so I don't rely on my Dragonfly as a primary meat hauler. I figure I'll take out the first load with it, then grab my pack frame in the truck and carry out the rest of the loads with it.
The Dragonfly is durable as heck, extremely well designed and super comfortable for me to wear. Sure, there are lighter packs out there but I'll sacrifice the few extra pounds of weight for the rifle scabbard, durability and comfort.