How to spawn all particles at once in UE4 and use gravity on them?

I am making some particle systems for a bullet now. One of them is firing PS. So, I need to spawn all the smoke particles at once, not one per tick. Is it possible? And second thing second, I reaaly would like to use velocity decreacing module, but I’ve found only accelerating module. Do you know any trick to decreace particle’s speed and use gravity on exlosion particles?
Much thanks, if you are!!!

To spawn particles immediately use Burst in Spawn module.

Acceleration module should be used to change velocity.

There are mane particle system examples in ContentExamples project.

Thanks, but burst doesn’t work, I’ve tried some ways from internet forumes, but burst doesn’t work(. I’ve found particles in market, but they are so hard, that it doent give me a hand.
Kirill.