A fully customizable 3d printable insert for ammo boxes. Change the parameters in the Fusion 360 model to match the drawing for a specific cartridge and itll generate an easy to print insert that will hold the cartridge at the body and the shoulder datum, leaving the bullet seating unmolested. Should work for any standard bottlenecked rifle cartridge, might be able to get it working for a rimmed or belted magnum cartridge if you play with the parameters

I recommend pairing the inserts with a 3d printed Frog Box:
[https://www.thingiverse.com/thing:4094861](https://www.thingiverse.com/thing:4094861)

No association with the designed of that box, i just think its a fantastic ammo box

Included STL is sized for 5.56x45 NATO, other calibers will need to load the f3d file and alter the parameters in the model