I saw them in a pawn/gun shop a few months ago in 12ga. At the time I remember thinking - "thats a weird shell" .... I'll try and remember where it was...... somewhere between FWB and NW PCOLA - which is a large area - but I'll try and remember.....don't hold your breath tho - been shopping a lot of places since then......If you or anyone else has steel case, but in 12 ga shotgun I would be interested.
If a 12 ga saiga magazine is loaded with plastic shells, the first shell is pressed partially flat. That likely will not happen to a steel case shell. I would want such a shell in buck shot loading.