Is there a shell holder for the Lee hand primer for the 50-90 cartridge?
If so, do you have the number please.
Thanks

No but there are other hand priming tools that use a press shell holder that will work or use one of the ram prime tools.

That's a big base for a shell plate.

I can't remember if mine is a Lyman or RCBS shell holder, but I'm using it in my RCBS priming tool and RCBS Ammomaster press. I'm guessing that it's RCBS? Sorry all my loading stuff is still buried in boxes in the garage or I'd go find it.

I remember that the BELL brass didn't fit in the shell holder very well, but the Starline brass fits perfectly.

Found the RCBS number, it's shell holder #31, Huntington's part number 9231. Here's the link:

http://www.huntingtons.com/shellholders.html