12 Gauge Shell Boxer

After having made multiple iterations on this 12 gauge shell stacker/boxer I can see why the commercial ones are metal, having both strength and thinness. If this doesn't work well for you I encourage you to try scaling it. This design is a careful balance between size and strength. I found that very small changes made a big impact on its functioning. In this final design I made the width 105mm and the thickness of the walls 1.15mm. It features a slant in two dimensions to ease loading. I found that placing the first shell crimp side out aids in being able to pull the box over the top. I pull the box all of the way over the top and then turn it over and tamp it on my worksurface before pulling it out. If the shell box opens at both ends it works easier if the bottom is open as you pull it down and the closing it before turning it over

I printed this out in PLA. I am working on perfecting a 20 gauge version and will upload it in the future.