Here are two 6mm Flobert/22 RF primed turned brass cartridges with round rubber ball bullets.
The larger one has a rim diameter of 12.75mm, case diameter of 11.92 mm, a case length of 13.1 mm and a 11.75mm rubber ball. The smaller one on the right has a rim of 10.96 mm, case diameter of 9.96mm, a case length of 11.9 mm and a 8.85mm ball.
Base of smaller cartridge on right.
Both are primed with copper Sellier Bellot 6mm Flobert/22 RF blanks. No powder is present.
Any ideas what they are?