I was shooting my Remington Rolling Block #4 in .32 RF and the second shot with a cartridge powered with a #3 Dewalt Green Powder Load had a head separation. I had fired three rounds with round balls, acorn blanks and black powder and then one with the Powder Load and a 86 gr. outside lubed bullet. Then I fired the offending round, ending the shooting for the day as I did not have the tools to remove the stuck case body.
I have never had a head separation with a straight walled case. I am pretty sure this is a case I bought not one I made but the ones I make are much like the ones I bought anyway. I don't know how many times I have fired this case but can't be a lot only half a dozen at most. It was a pain getting the brass out of the chamber, usual easy solutions did not work.
Tim