Just a personal experience with a leg-o-mutton case. Year 1972, the case was from Herters and held a Browning superposed 20. I was loading a chevy 1/2 ton to go chukar hunting in E OR. As I neared completion of loading I leaned the case up on the rear bumper because I got distracted by something (phone call maybe). Finished with the distraction I got in the truck and started backing out the drive. Felt the right rear wheel run over something. Stop. Just forward of the wheel was a freshly scuffed leg-o-mutton case. Thoughts at the time "please let it only be stock damage." Opened the case. No damage to the Browning visible. Went hunting and apparently no damage to barrels as I shot as well (or poorly) as previously. Lesson - never lean anything against a vehicle!!!
Chuck