I have a 11.15x47R that I made brass using fire formed 9.5x47R.

I bought Lee dies for 11.15x60R (43 Mauser) and shortened the resizing dies. These work very well.

The 10.5x47R has a Mauser A head which is thicker than a 45/70 rim. I made brass by thickening the rim of 45/70 brass by tapping the rim and resizing. These work very well.

I use both black powder, Triple 7 and 4198.