I was never keen on the idea of making one type of case from another, now I know why – because fire forming and otherwise tweaking the brass does not update the head stamp.
No doubt doing this is safe and effective in the hands of someone who knows what they are about (these would be the wildcatters), and it has brought us many interesting cartridges, some of which have gone on to become "factory" cartridges, others not.
But wildcatting and similar activities can also cause confusion and potential hazard to those who purchase, inherit or otherwise acquire these items.
My own preference is to stay with calibers and components that are what they say they are, and that come from trusted sources.
Glad to see this sorted out, it is great to have lots of very experienced and knowledgeable shooters and reloaders here.
Snapshot