Question how to deal damage properly/better using PUN 2

for my game, i am storing health as a custom property. whenever a bullet collides with a player, it finds the player's photon view, takes the current health, then subtracts by a certain amount of damage.

this works for most types of guns, but for guns with multi shot, like a shotgun, it won't. all of the bullets take the same original health, then all subtract by a certain amount of damage, essentially causing the damage to equal to one bullet. this problem is most likely caused by custom properties not updating with in a frame.

is there a better way to approach dealing damage, or is there some way to force update custom properties?

 

I don't know if it's a common approach to have shotguns shoot individual bullets...
One client should calculate the damage. You could collect damage for a frame, then after that is resolved, send all damage at the end of the frame.
In doubt, have a local variable to store the health, work with that and update the custom properties accordingly, several times a second.