Skeet shooters have been managing to shoot subgauges for years without that "particular accident happpening a lot."
Not sure what you mean by the comment about shell colour but it has been the North American industry standard that all 20 gauge shells use yellow plastic since the 60's. This makes them stand out and makes a 12/20 burst less likely.
If the 20 gauge "frightens" you then you'd better brace yourself what comes next. The 28 goes on top of the 20 and the 16 goes on top of the 10 gauge just like the 12 and 20.
I posted in another thread about having come close to a 12-20 burst and that didn't cause me to be "frightened" of the 20. The solution is simple. When your gun doesn't fire don't assume anything, find out why it didn't fire, follow the basic safety rules and you'll be fine.
I don't think BobbyIronsights has anything to worry about, especially in his 8ga. That 20ga. shell will just fall right out of the muzzle, when it's chambered in the "big 8"


















































