I was somewhat indirectly involved with an idiot buddy that just had to have some genuine silver bullets loaded for his equally garish .45 Colt SAA.
Wound up having to cast a wax model from a RN mould that he took to a Jewler to have the bullets duplicated from. As it turned out they were undersized and we wound up having to apply a really tight crimp to hold them in their nickle plated cases!
Now, don't ask me to explain why, it wasn't my deal, and you'd really have to know the character to appreciate the story....still, it was an interesting project and one that's permitted me to rag him for years about.
As I recall, we finally settled on the Lee RN mould that I believe was supposed to drop a .456 projectile......as I said, after going thru the process it was really way too small for the LC case.
My advice.....DON'T!