There may have been a "die sets" made here and there to run on some of the pistol/rifle presses out there? I think though with the compition of the shotshell press manufactures the die sets never really took off.
There are many presses out there for shot shell
lee makes the most affordable, I have not had much luck with the lee's
entry level and for my submission MEC offers the best bang for the buck. If You look really hard you can find used MECs for a great price.
Dillons shotshell machines are nice but prices start to climb
I had a RCBS grand which runs 600ish new. I had a early model that was a real PITA to set yup and I had to get some updated parts from RCBS. I never got it running right before someone made a great offer to buy it.
SPOLAR GOLD WITH all the gizmos is the best I have ever seen, just shy of a commercial reloader. The spolar is very expensive. I got see one in action when I went to ATA shoot in CT.
As with any loader some like others better than others. Some are a bit easier to use and adjustments are simple and quick while others are a bit more mechanical.
I prefer mecs.
I have the jr,versamec,sizer,650,9000 all are good and easy to use. The 9000 can be a bit quirky but I have 3 of them. I purchased all mine used from yardsales,estate sales and from fellow shooters getting out of it.