I got mine back in 2018 and in my research I ended up getting the RCBS 500 S&W dies marked mag/special so I would not have to cut down the crimp die to accommodate the 500JRH case. This may have changed now that the JRH is a little more common but if you want to be sure and don't have a means to cut the crimp die down a bit, I would recommend the RCBS die set #23812 and I would also recommend a separate roll crimp die which is RCBS die #23838 (if you have a press with at least 4 stations, I like to crimp separately). I have built over 1000 rounds with this setup and it works great. Just my 2 cents.
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