The only case conversion I've ever done was reforming surplus blanks (x 63) into 45 acp shotshell brass. It is a really simple one step operation involving running a blank up into the trim die on an extended shell holder and then cutting it off with a hacksaw and deburring it.
(This lets me get a military primer live & crimped in place.)
They work ok but will not cycle it 100%. Considering they cost less than the store bought Speers, they work great.
"Always place your clothes and weapons where you can find them in the dark"
"Understand that the enemy is not the enemy in his own eyes ;this may offer you an opportunity to make him your friend. If not, you can kill him without hate, and quickly."