A drop in bullet separator for use with pastera's powder funnel https://www.thingiverse.com/thing:3224848  or my redesign of his powder funnel https://www.printables.com/model/187175-powder-funnel-3-steps 

It is a simple cylinder sized Radius: 27.50 mm, Height: 8.00 mm. The trick is to use the following settings:

Perimeters: 0

Top Layers: 0

Bottom Layers: 0

Infill Density: 20%

Infill: Grid

Print Settings

Printer Brand:

Creality

Printer: 

Ender 3 Pro

Rafts:

No

Supports: 

No

Resolution:

0.12

Infill: 

20%

Notes:

Perimeters: 0

Top Layers: 0

Bottom Layers: 0

Infill: Grid

Category: Parts