About this 3D model

.410 Bore Shotshell Snap Cap / Dummy Rounds Notes Should be printed with proper material & infill for strength, especially for the rim. Models 410Bore_[2, 2.5, 3, 57_35mm]IN_Shell_Model_NoPrimerPocket.stl Has no primer pocket - Simplest file, No supports needed (Print with rim facing down) 410Bore_[2, 2.5, 3, 57_35mm]IN_Shell- Primer Pocket.stl Has primer rim pocket and primer pocket on the bottom. For some snap caps it can be useful to put some Silicone / rubber in that area to test for firing pin indentation. This will require some supports. It cannot be printed upside down because of the cartridge rim. ATI .410ga Rifled Slug 2.5 inch Shotgun Shell_NoPrimerPocket.stl Specific shell modeled on ATI .410GA 2.5" Rifled Shells - for function cycle testing in AR platforms. 4/22/23: Added two new STL for 2.5" rounds that are 2.5" style but are actually ~57.35mm length (For AR platforms) 4/28/23: Added a 2.5" Shell (57.4MM) modeled after ATI 2.5" Rifled Slug. Has taper at top (cycling for AR style needs this) - this model cycled/worked in an AR-15 lower. It's in the No Primer Pocket Section