How to choose printing material

There is an infinite amount of brands and types of filament. There are many great options as well as bad options. 

Most users stick to PLA+/PLA pro for most builds, due to its durability, ease of printing and affordability. That said, PLA does not resist high heat, so considerations need to be made to ensure there is no warping once assembled. Do not keep PLA parts in a hot car, and depending on design, care needs to be taken when shooting repeatedly. 

More experienced users use Nylon based filament, such as PA-6 and PA-12 in either glass or carbon filled.  

Nylon prints are more of a challenge due to its hygroscopic properties. Even short-term exposure to high humidity can result in “wet” filament which, when printed, can lead to inconsistency in dimensional accuracy and part strength. Due to this property, it is critical to store the nylon filament in a dry place. Some FDM 3D printers are enclosed so moisture can be safely avoided. If the material is exposed to air while printing, it will be prone to moisture. The moisture absorbed by nylon gets heated up when it passes through the heater and the moisture forms bubbles only to burst during the heating process. This bursting leaves visible gaps in the 3D printed parts, leading to poor output.

However, when nylon prints come out right, they will make for long lasting prints that will better withstand heat.