Yeah,
I knock my primers out with a universal decapper on a $20.00 Lee press as a separate step. Keeps that nasty primer spooge off the main shaft of my expensive press.
JCN

Sure would be nice if the Rock Chucker ram came with a hole down the center so that the crap would fall out the bottom and not be picked up by the outside surface of the ram.

Hart

I used siliconed a couple of really strong little magnets at the rear corners of mine.

Click on , stays put , pulls right off for emptying.

Travis F.

I used a short piece of parachute cord with the ends knotted to the right length to just stretch from groove to groove on the catch tray of my old RCBS Jr. My "new" Rockchucker still has the original part, but it's only 15 or 20 years old, a mere baby .

Any similar size cord will work fine, and if knotted to the right length will keep a bit of tension on the tray.

Jim