Thanks for the info 2152hq...learned something today...interesting thing is they were in a bag of reloads another Forum member gave me...must have shot OK from my S&W revolver as I found them when I was going through brass from my shooting session...
The semi rim is enough so they can also work just fine in revolvers too.
I'd guess a regular 38sp shell holder should take care of them for reloading as long as the fit is decent and the case can't move side to side in it and pull free.