How do I make my particle trails look dense?

I have a projectile in my mod, and its completely translucent, and relying on particels to do the visual part. Now, when I simply use a "on tick spawn particle" type procedure, it kinda looks bad, because it moves a lot between ticks so it looks all unconcentrated and weird. How can I solve this issue? I'm thinking predicting where the projectile will be in the next tick and interpolating between the current and the future position, but honestly I have no idea how to do that in procedures (or java).
Thanks in advance!