I downloaded and printed primer catch from https://www.printables.com/@synfinatic_582025 for my RCBS Rockchucker IV
https://www.printables.com/model/537788-rcbs-rockchucker-iv-primer
I did not want to have a tube running to a collection vessel on the floor so I made a collection bin in Fusion to slip underneath the tube feed instead.
I have included .stl, .step, .obj and .f3d files if you want to play around with any of the dimensions.
The author marked this model as their own original creation.