What do I need to change in Physics Asset if Character gravity is 4x?

Development Character & Animation
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  1. What is the formula or multiplier of Gravity on a Physics asset?
  2. I.e. which value in the Physics asset do I need to change - to slow down the physics wiggle - when Gravity is 4x? E.g. do I change Mass Scale from 1 to 4 or 0.25 (on a Physics Body), or Linear motor or Max force (on a Constraint)?
  3. And where else is gravity set? (E.g. in the level/world). I forgot.

Details:
In a test project I setup hair with a Physics asset (I changed many settings in Physics Body and Constraint - got it perfect to look realistic). This character had 1x Gravity (Default starter template).

I migrated the Character SK (and physics) to my main project.

I added it to my existing Character BP, where Gravity is 4x in my Character Movement component. (Default is 1 right?)
But now the Physics hair is jittering (moving) very fast. How do I counteract that - to slow it down it seems? Thank you.