I bought this for backcountry mtn goat hunting. We generally ride to place then go on foot during the day. This pack is just about ideal for our situation. It fits a tripod and spotting scope, plus enough room for day's worth of stuff. And being skinny, can simply hang on the saddle horn opposite the gun scabbard and isn't bulky or in the way.
I love having the gun in the pack when hiking steep country, which gives you your hands free to climb and catch yourself on nasty slopes.
I like to leave the spotting scope and tripod in their cases inside the pack when riding, and then set them up and strap them to the back of the pack when hunting. This saves valuable time if you need to quickly set up the spotter on a critter.
The only complaint is the end on the hydration bladder won't fit through the hole in the top of the pack for that purpose. Not a big deal, but it makes you wonder if they ever tried using the pack with their own bladder.
In my opinion, this is the ideal horse hunting pack.