I guess it was sometime in 2019 that I purchased a rather unique toolhead for my 550. Upon delivery, I was extremely impressed with the part and tried to purchase another one, with little success.

In most respects, the toolhead looks like any other toolhead, but the male protrusion that fits into the female slot of the press body is offset. However, the toolhead comes with a "U" shaped shim that can be installed either above or below the protrusion. This method allows dies to be adjusted for either a 38 or 44 Special if the shim is above the protrusion, and by merely placing the shim below the protrusion the dies are ready for loading the corresponding Magnum cartridge. With this method, I can load Specials or Magnums without adjusting dies, but merely by shifting the shim. I want to say that this toolhead cost only a few dollars more than a regular 550 toolhead.

Without having a toolhead as I described made custom, has anyone here come across a source for a toolhead like this?

As always, thanks in advance for your help!

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Judge control not gun control!

Never seen one. Similar to the washer/spacer that comes with the RCBS die sets. Guess Dillon must have figured they would rather sell us a second die set. I know I bought a second for both 38/357 and 44sp/44mag just so I didn't need to be switching the settings back and forth.

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"Tastes just like chicken"

Seems like the size die wouldn't go all the way down on the mag brass doing it that way.

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protocalldesign.com

They are made by Whidden (Doug Williams).

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be safe
Ruggy

You are correct the mag brass will not be full length sized, but does it matter in most cases, I would venture not.

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be safe
Ruggy