I have the molds for them. I have both the .50 and the .54 caliber LEE Molds. Mine are the improved minnies. To be very honest, I have tried them in a number of rifles and never had much accuracy out of them. It might put two down range real well and then the next one might miss the entire box. I think if a person had something with a real small bore they might work, but I even teflon tape wrapped them. I just never got the kind of accuracy out of them I expected, and the molds sit on a shelf unused, in the wood shop.