Here is the piece of code I was talking about:
This is added at the end of projectile's code to set the damage drop for that projectile. I wish there was a way to flip it so damage is added, ah well...
There is also this other peculiar piece:
I thought, maybe, that prevents the projectile from exploding within a certain distance, but I don't think it causes the explosion "push" which you want. Worth playing with. You can find this line in the vanilla AA projectile.
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