12ga 2 3/4in Dummy Shells


12ga 2 3/4in Dummy Shells: Laffs Dynamics

3D printed dummy shell, dimensions of a 12ga (2 3/4in) cartridge.

Printer Used: Ender 3 V2

Filament Used: PLA+

Print Settings:

Extruder: 218C
Bed: 56C
First Layer Print Height: .18mm
Standard Layer Height: .12mm – .16mm
Wall Thickness: .40
Wall Perimeters: 5+
Infill: 32%+
Material Flow: 100%

Depending on your machine’s settings, you might need to scale +/- .01% for best fit of snap caps into the chamber.


ProSpaceDog: Printed and tested multiple dummy shells. Shells tested in a Remington 1100 semiauto shotgun. Gave data on
reinforcement structures within the shell. Provided still images.

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