If you like my models and feel inclined, I could always use more filament for test prints. https://ko-fi.com/plaid_brad
The old CH “H” Reloading Presses are fantastic single stage presses. They're built like tanks and are quite fast and smooth by design. I use one as a dedicated de-capping press with Lee Universal De-capping die. Problem is, there's no included way to collect the spent primers and I would just sweep or vacuum them up from the floor and bench.
This primer catcher will hook-on from the back of the press. If properly printed and installed, a shell holder can be removed or installed with the catcher in place.
Print in the orientation as the model is in the STL. I suggest painting on supports as shown in the 3rd photo, just the horizontal overhangs and the sharp angle of the back. Didn't make a difference with or without support in the hole for the shell holder.
Model shown printed in Polymaker PolyLite PLA Pro.
The author marked this model as their own original creation.