I have the following cartridge, which has a lead slug sitting slightly below the surface of the case. It is not a round ball, looking more similar to a solid slug seen in shotshells. The case mouth is slightly rolled to retain the slug.
Dimensions are in mm, with inch dimensions in parentheses.
The only case that I could find with similar dimensions was the .32 H&R Magnum but this is clearly different, especially given the taper. I cannot accurately measure the height of the extractor groove, nor could I measure its diameter.
Does anyone know what it is and who made it?