The problem with decapping.

Hey Notlwonk    Here is my answer to your question. Don't misunderstand that this catches all the spent primers. It does better than the original, which caught about ninety percent. The red in the tray is a small piece of cloth to dampen the bounce effect. Lowes sells the electrical box for a couple of bucks. Adjusting the decapping die correctly, so the ram slot rises a quarter to three eights of an inch above the cast frame on completion of stroke will greatly help contain debris. This press is a 1966 vintage, purchased new as a birthday present for me. After chasing replacement trays for too many years and running a vacuum daily to pick up primers, a friend of mine made this slick catcher for me. A quarter inch aluminum rod through the primer install boss holds it in place. It has been in steady use for over ten years now.       Now on to the definitive answer for complete containment of discard primers. No,  I am not a Dillon proponent!! That point being made I will continue. The Dillon RL300 has a system that positively will catch each individual decapped primer regardless of make, application, manufacture, type or use. A small folding tray rides directly under the shell carrier specifically for capture. Upon down-stroke the small tray opens and deposits the individual directly into the easily removable aluminum catch pot. Even with the accumulation of several hundred, not one is permitted escape. I personally use this press regularly and can attest to just how well it works. It also makes a pa-tink followed by a light clink noise on every stroke of the handle which I found to be soothing. Of course the RL300 is obsolete along with this amazing system and that my friends is BULLs**t.                                                                                                                           Roy