you dont have to worry. remember RepNotify will only fire when its ready (network safe) yes this means the player gets a delayed HUD but thats what lag is, we’re all used to it.
that said if you fire 35 shots, it doesnt update 35 times. it updates once when its ready with a value between (x and 35) if that make sense.
or if it makes you feel better, lets say thats exactly how Lyra or even Fortnite would do it
Reliable RPCs are what could overload the network which is why you should use them sparingly