If you want to print these kind of filaments you will need to install a hardened steel nozzle.
The small carbon or glass fibers in those filaments are very abrasive and your calibrated 0.4mm brass nozzle will become a lot shorter a very short time meaning adjusting the Z-height every couple of hours. During prints this will increase layer height while printing!
Stainless steel helps a bit but cannot resist that long neither.
The best solutions are hardened steel nozzles like the ones E3D supplies for their V6 and Volcano.
If you want to spend more money you could even have a look for calibrated ruby nozzles here
Where a standard nozzle would cost around 4$, a hardened steel nozzle would cost the triple and a ruby one starts around 80$. Hardened steel is worth the price. I have a 0.6 and a 0.8mm hardened steel volcano nozzle. I don't see a use for the 0.4mm as this is kind of material is mostly used for high strength items and you will want to print wider layers for that.