This cartridge is in my collection since 1991, however I never bothered to find out what it is. Untill now.
I swapped it during one of the first Czechoslavakian collectors meeting in the early Nineties. I was told it is an experimental Russian sporting/match cartridge for a Nagant-like revolver, named “Raskanikov”. I wrote down this name on the piece of paper and always kept it together with the round.
It wasn’t an expensive swap, so it doesn’t bother me even if it’s fake or home-made.
Has anyone got a clue of what it is??