Is mouse position laggy on server?

I have a weapon that shoots a projectile which you can control with your mouse. It works by having the localscript calling the severscript with the player's mouse position repeatedly through a loop.

while ready == false do
    event:FireServer("Firing", mouse.Hit.p.x, mouse.Hit.p.y, mouse.Hit.p.z)
    wait()
end

It works alright when I play on solo, but I worry about if it will work with 10+ player, as I've heard *mouse *is not recommended to use in serverscripts.