This one is kind of cute. Mostly aluminum construction; folds down reasonably flat, clamps to anything 4" thick or less and actually has compound leverage. Works with any snap-in shell holder and is 7/8" x 14 TPI, for standard dies.

I believe they were made for the PPC series of cartridges, so even a .30-30 would be too long for it. But for any short cartridge like pistol, revolver, 73/92 rifle and (as shown) the .25-20 Single Shot, they are (as COL Townsend Whelan might say) "Perfectly Splendid!"

Click image for larger version. 

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