Just got one of these cases for my 16 ga side-by-side, and these are fine. Galazan.
And if you take your shotgun out of the case to go bird hunting, over time there is over a 50% chance you'll be peppered by bird shot. Powerline has that story, but erroneously uses the term "BBs." BBs are much larger than "bird shot," and generally are only used for cartridges designed for geese. It seems far less likely in European driven hunting, where the shooter shoots from a "peg" without moving, while the birds come from one direction - and usually high. In the US, we actually hunt, and therefore tend to get scattered around at times. The only perfectly safe bird hunting is one man (or gal) and one dog.
But this subject does bring to mind the great movie, The Shooting Party, (1985) with James Mason and John Gielgud. If you haven't seen it, you must. It's a meditation on pre-WW1 England, and the end of an era, and it prefigures the horrors and the cultural changes that the Great War will bring.