Weavedreamer
32 Cal
They’re the 1081 red label rws musket caps. The yellow label ones don’t hold up the same in mine and others experience. I believe the red label are like a magnum equivalent
https://guntopia.hu/product/rws-4-wing-1081-musket-caps-pk-200/
https://guntopia.hu/product/rws-4-wing-1081-musket-caps-pk-200/