Multiple bullets - problem with effect position

Unity Engine
1

I have problem … when i have multiple bullets spawn on the scene when i try to instansiete explosion effect the positon of the efect is not the bullet which hit the collisonbox but the newest one … dunno how to bypass it

this is my instansiateon of the explosion effect code

[RPC]
void ExplosionParticle() {
	Instantiate( explosion, transform.position , Quaternion.identity );
}

i tryed to do it with

position = collision.contacts [0].point;

but now when 2 bullets at scene there is no exploision effect …
( works if only 1 bullet at the same time on scene )

2

should i pass the position to diffrent function wchich will instansiate the effect?

yeah that do the trick … sorry for trashing forum