29/1/21 Dropped width down very slightly to 8.85MM due to the occasional jam

8/6/20 Dropped width down to 8.9MM for smoother extraction, use super glue inside the brass for a good clean hold

28/5/2020 Updated shape and size after running tests as extractor was pulling insert out of the brass

This is a 9MM projectile insert that can be pushed all the way (for more weight) into a used brass casing to create a solid snap cap or dummy round for dry firing. The brass handles ejection better compared to plastic but the printed projectile gives away the fact this is not a live cartridge and is cheap to replace.

Creality

Ender 3

No

No

0.16

25%