Today I found a 20 round box of fired RWS 9.3 X 74 R cases. I want to convert them to .410. I know some of you have done this and it should not be too complicated. Would someone please post the proper procedure. Should I anneal and what load is used to form. I really don't want to mess this up as these are scarce and expensive.
As stated they are fired but in nice shape, look once fired sized and deprimed.
Thanks,
Dave