Hi @Rev0verDrive and @jwatte
Thank you very much for the explanation.
I was trying to make a pool of objects (of projectiles) and a NetworkManager. (To reduce network and CPU usage)
I thought I could use a single replicated variable for all objects. Obviously I was wrong.
Now i’m using “FFastArraySerializer” and “FFastArraySerializerItem” for replication.
This seems to work much better than my previous idea.
Basically I need replication to trigger sounds and particles on the client side. (“co-simulate”).
Sometimes I feel like an idiot. I’ve been using Unreal for over a year and I still didn’t know that calculations are updated every tick. 
Well, this is like the umpteenth time I’ve broken all my code to improve it. The novice circle.
Thank you so much for your help!! 