Projectiles using Raycasting, looping to detect on hit?

I have created a system that takes the user input to fire a ray; This ray is then fired across the server and then firesallclients to produce a projectile which tweens to the end of the ray - or to the max distance the ray is allowed to travel..

I have attempted to now cause damage to a player if the projectile hits the player upon collision.. But the RayCast is causing the damage to happen before the projectile even hits the player..

Any ideas?

Local:

local UIS = game:GetService("UserInputService")
local TweenService = game:GetService("TweenService")
local Spells = game.ReplicatedStorage.Spells
local WandClicks = game.ReplicatedStorage.WandClicks
local Debris = game:GetService("Debris")


local Tool = script.Parent
local plr = game.Players.LocalPlayer
local Camera = workspace.CurrentCamera

local raycastParams = RaycastParams.new()
raycastParams.FilterType = Enum.RaycastFilterType.Blacklist
repeat wait() until plr:HasAppearanceLoaded()
raycastParams.FilterDescendantsInstances = plr.Character:GetDescendants()


local function getPosition(mouseXY)
	local x,y  = mouseXY.X,mouseXY.Y
	local ray = Camera:ViewportPointToRay(x,y)
	local result = workspace:Raycast(ray.Origin, ray.Direction*1000,raycastParams)
	if result then
		return result.Position
	else
		return ray.Origin+(ray.Direction*500)
	end
end

Tool.Equipped:Connect(function(Mouse)
	UIS.InputBegan:Connect(function(input,gp)
		if not gp then
			if input.UserInputType == Enum.UserInputType.MouseButton1 then
				print("send")
				WandClicks:FireServer(getPosition(UIS:GetMouseLocation()), script.Parent)
			end
		end
	end)
end)

Spells.OnClientEvent:Connect(function(Spell,SentFrom,SentTo)
	local SpellCloned = Spell:Clone()
	SpellCloned.CFrame = CFrame.new(SentFrom)
	
	local tweenInfo = TweenInfo.new(2*(SentFrom-SentTo).Magnitude/100)
	local goal = {
		["CFrame"] = CFrame.new(SentTo)
	}
	local tween = TweenService:Create(SpellCloned, tweenInfo, goal)
	SpellCloned.Parent = workspace
	
	tween:Play()
	
	
	tween.Completed:Connect(function(playbackState)
		if playbackState == Enum.PlaybackState.Completed then
			local HitEffect = game.ReplicatedStorage.SpellB
			local HClone = HitEffect:Clone()
			HClone.Position = SpellCloned.Position 
			SpellCloned:Destroy()
			HClone.Parent = workspace
			Debris:AddItem(HClone, 1)
		end
	end)
end)

Server:

--local x = game.ReplicatedStorage.Spell1:Clone()
--x.CFrame = CFrame.new(pos)
--x.Parent = workspace

local ReplicatedStorage = game.ReplicatedStorage
local Event = ReplicatedStorage.Spells
local Spell = ReplicatedStorage.Spell

ReplicatedStorage.WandClicks.OnServerEvent:Connect(function(player, mouseLocation, tool)
	local rayOrigin = Vector3.new(tool.Handle.Position.X, tool.Handle.Position.Y+2, tool.Handle.Position.Z)
	local SentFrom = rayOrigin
	
	local raycastParams = RaycastParams.new()
	raycastParams.FilterDescendantsInstances = player.Character:GetDescendants()
	raycastParams.FilterType = Enum.RaycastFilterType.Blacklist
	
	local rayDirection = (mouseLocation-rayOrigin).Unit
	local distance, result, maxdistance = 0, nil, 200
---
	local count = 0
	repeat 
		
		if distance < maxdistance then
			
			result = workspace:Raycast(rayOrigin, rayDirection * 20, raycastParams)
			rayOrigin += (rayDirection * 20)
			distance += ((rayDirection * 20)).Magnitude
			
			if result then
				Event:FireAllClients(Spell,SentFrom,result.Position)
				if result.Instance.Parent:findFirstChild("Humanoid") then
					result.Instance.Parent:findFirstChild("Humanoid"):TakeDamage(50)
				else
					print("I hit something that wasn't a player - Whoops")
				end
				
				break
				
			end
			
		else
			
			Event:FireAllClients(Spell,SentFrom,rayOrigin)
			print("I hit nothing :( ")
			break
			
		end
		count += 1
		wait()
	until count >= 20
---	
end)

Thank you!

Maybe try using this script, It is on an explosion.

ball = script.Parent
damage = 50

function onTouched(hit)


	local humanoid = hit.Parent:findFirstChild("Humanoid")
	if humanoid~=nil then
		tagHumanoid(humanoid)
		humanoid.Health = humanoid.Health - damage
		wait(2)
		untagHumanoid(humanoid)
		connection:disconnect()
	else
		damage = damage / 2
		if damage < 2 then
			connection:disconnect()
			ball.Parent = nil
		end
	end

	if math.random(1,3) == 2 then
		explosion = Instance.new("Explosion")
		explosion.BlastRadius = 12
		explosion.BlastPressure = 100000000
		explosion.Position = script.Parent.Position
		explosion.Parent = game.Workspace
		connection:disconnect()
		ball.Parent = nil
	end

end

function tagHumanoid(humanoid)
	
	local tag = ball:findFirstChild("creator")
	if tag ~= nil then
		local new_tag = tag:clone()
		new_tag.Parent = humanoid
	end
end


function untagHumanoid(humanoid)
	if humanoid ~= nil then
		local tag = humanoid:findFirstChild("creator")
		if tag ~= nil then
			tag.Parent = nil
		end
	end
end

connection = ball.Touched:connect(onTouched)

r = game:service("RunService")
t, s = r.Stepped:wait()
d = t + 5.0 - s
while t < d do
	t = r.Stepped:wait()
end

ball.Parent = nil

Or this way.

player = game.Players.LocalPlayer 
Tool = script.Parent
Ammo = 10
Mouse = player:GetMouse()
function Shoot()
if Ammo > 0 then	
local B = Instance.new("Part",workspace)
game.Debris:AddItem(B, 2)
B.formFactor = "Custom"	
B.Size = Vector3.new(3, 0.2, 0.2)
B.BrickColor = BrickColor.new("New Yeller")
B.CanCollide = false
B.CFrame = Tool.Main.CFrame
B.CFrame = CFrame.new(B.Position,Mouse.hit.p)
local v = Instance.new("BodyVelocity", B)
v.Velocity = B.CFrame.lookVector *90
v.MaxForce = Vector3.new(math.huge, math.huge, math.huge)
	end
end

Tool.Activated:connect(Shoot)

I've been working on raycasting projectiles for a couple days now, and I'm not exactly sure what you're trying to achieve and why the tweens in your projectile are necessary but, I can say when it comes to projectiles I had and idea the other day encouraged by one of my good friends. You can make the ray inside the projectile easily. There are lots of code that I don't understand why you're going the extra mile, when you can just simplify it. Such as the one below,

tool.Handle.Position.X, tool.Handle.Position.Y+2, tool.Handle.Position.Z

When possible you can do this.

local rayOrigin = Handle.Position + Vector3.new(0, 2, 0)

Anyways, I made a successful damaging projectile the other day and I'm hoping it can put any type of inspiration into you without entirely spoon-feeding.

--//Variables\\--
local RayPart = Projectile

--//Raycast Parameters\\--
local rayParams = RaycastParams.new()
rayParams.FilterDescendantsInstances = {Projectile, Player.Character}
rayParams.FilterType = Enum.RaycastFilterType.Blacklist
    

--//Function\\--
    
    while Casted do
        wait()
        local RayPartPosition = RayPart.Position - (Vector3.new(0,2,0))
        local hit, position = workspace:Raycast(RayPartPosition, Projectile.CFrame.lookVector*70, rayParams)
        if hit then
            if hit.Instance.Parent:FindFirstChild('Humanoid') or hit.Instance.Parent.Parent:FindFirstChild('Humanoid') then
                local hum = hit.Instance.Parent:FindFirstChild('Humanoid')
                hum:TakeDamage(20)
                Casted = false

I would also say start to send more of your variables over through the parameters and stop doing as much as you can on the Client because it's very risky. I hope this helps!