How would I add spread to my BV gun?

I tried using BodyAngularVelocity, but the direction of the bullet didn't change, it just rotated and kept going forward. Then I tried using math.random Vector3 for the velocity but that didn't go to well.

local BulletBV=Instance.new("BodyVelocity")
	BulletBV.MaxForce=Vector3.new(math.huge,math.huge,math.huge)
	BulletBV.Velocity=Mouse.Hit.lookVector*400
	BulletBV.Parent=Bullet

So if you have any answers I gladly thank you!

BulletBV.Velocity = Vector3.new(math.random(-10,10),math.random(-10,10),math.random(-10,10))

That will make it travel in a random direction within those perimeters. Add it to wherever the projectile is already going and you're set.

-- Phantom