This is an adapter for using LEE/etc style slide-in shell holders with an old Herter's press (3/4" base). While quick-change adapters exist, this design is simpler, more rigid, and lower-profile. The reduced height offset should obviate the need for special long priming tools.
I am offering this only as a demonstration of a design concept. Printing this with any pedestrian FDM/SLA process is going to be a waste of time. The material is simply not appropriate. I went so far as to print and destroy a part just so I could take a picture for you.
I crudely turned the original from scrap steel, but I'm including two models. The first model is as-turned. The second model is a heavier design that's slightly more suited to weaker materials (e.g. aluminum), though its lack of symmetry may be an obstacle if all you have is a lathe. Clearances may need to be tweaked.
The included STL file is intended only for the web-preview.
Category: OtherThe author marked this model as their own original creation. Imported from Thingiverse.