Lee Load Master Primer Tray

thingiverse

I needed a primer tray that could hold CCI primers from the square box without overlapping like with the round tray. I printed red_rider95's primer tray and encountered issues with the cover staying tight and the latches breaking. Since I use an angled screwdriver to stop the primers from falling out when placing the tray in the press, I removed the funnel stop as it wasn't necessary for me. The funnel was made the same dimensions as the original round tray so this tray should work for both small and large primers. After experimenting with multiple latching methods, I decided on using a lever type latch to hold the cover on. The original round tray has a grid on the bottom for stiffness, so I used that method to hold a lever type latch and increase stiffness as well. The latches on the cover are glued in place so they can be printed flat for added strength. After adding the levers, the grid on the bottom is glued on. Some filing or sanding of parts is required to get everything to fit together properly. I used CA (cyanoacrylate or Super Glue) to glue the parts together. To account for shrinkage in my transparent PLA, I printed the cover at 1.004 scale for X and Y. The latches are designed so that all levers latch towards the funnel/press, allowing gravity to help keep them in place when on the press.