I remember an ad for a "universal" shell holder

[22to45]

This was many years ago and advertised as a better mouse trap. I think it had three jaws like a kinetic bullet puller, but I could be wrong. Anyone else remember it or try it?

 

[bcsteve]

I've seen a universal shelholder for a priming tool (RCBS has one) but not for reloading.

 

[sunray]

Lee makes a 'Universal Shell Holder Set'. More about a set of 'em "that fit over 115 different cartridges" than one for all cartridges though.
RCBS' Hand Priming Tool has spring-loaded jaws.

 

[CanAm]

Yes, I seem to remember one in Handloader magazine.

 

[ben hunchak]

The Forster Co-ax uses a "universal shellholder" type of set-up.

 

[22to45]

This was for reloading, I have looked for it on the net, but not found it.