I hunt in WY on horseback, from a base camp. Last year I switched from a Badlands Pursuit (1500ci) to a Mystery ranch Front (1220ci). I like the slimmer profile for when it’s hanging off the saddle horn, and the fit when I have it on throughout the day. The Tri-zip makes it easy access. I made up for some of the lost space by adding two MR belt pouches to either side for smalls and shock cord and a compression strap across the front for fast storage of clothing. But honestly I wouldn’t go any smaller. It’s a great size for my Texas hunting.
I also looked at the Scapegoat 25 and 35 but I don’t like or need a waist belt for the type of hunting we do. We pack out via pack horses so I don’t need a meat hauler. Do like the filet zipper design.
I looked at the MR Pop-up line and liked the design, but again I don’t need a load shelf, and was concerned how the pack would ride over the saddle horn.
Currently I’m eyeing the Kifaru Shape Charge and Urban Zippy, for if I decide on little more space.