I have the exact same bag. It is my "go to" bag for carrying my rifles to the club and back.
I have one suggestion for an improvement, the shoulder strap attachment points. An extra set near the ends of the bag, to enable carrying lengthways. In the current configuration, when you shoulder the bag you instantly become a "wide load"
With the strap going from one end of the bag to the other you can then shoulder it and have it hanging lengthways down the body instead.
Just read what I wrote, and am still not sure I am making mself clear