.223 Remington/5.56 NATO replica and snap cap

.223 Remington, almost identical to 5.56x45mm NATO, also known as just 223 or 5.56, is a centerfire rifle cartridge. .223 Remington was designed by Remington Arms in 1957. 5.56x45mm NATO was designed by FN Herstal in the 1970s.

Print this for props, display, education, training, just because it's cool, or scale it up to become a container.

Contains 5 files:

- Accurately sized replica: 223Remington_cartridge.stl

- Separate bullet and case pieces for easily printing in different colors: 223Remington_bullet.stl and 223Remington_case.stl

- Snap cap/dummy round for cycle and dry fire practice, with firing pin hole and reduced bullet size: 223Remington_snapcap.stl

- Information txt file with recommended print settings: 223Remington_info.txt

Originally uploaded on Thingiverse: https://www.thingiverse.com/thing:6008067 

Print Settings:

- Material: Tested with PLA and PLA+/PLA Pro.

- Overall print size: 57.4mm tall, 9.6mm diameter.

- Layer Height/Quality: 0.16mm or less recommended, 0.12mm works best.

- Infill: 20% is fine for display, 60% or more recommended for snap cap use.

- Print Speed: 50mm/s or less recommended. I do 40mm/s for cartridge, snap cap, and case piece; then 30mm/s for bullet piece. I also do 10mm/s initial layer speed.

- Adhesion: A brim might be needed, depending on the printer and bed type. I have a textured PEI bed, and with proper calibration, additional adhesion isn't needed.

- Post print: The pieces may require some sanding or filing for proper fitment if the bottom layers bulged out a little. Fitment should be a little snug, but easy to take in and out. A properly calibrated setup shouldn't need additional work.