How do I use FindPartOnRayWithIgnoreList?

So I have a flintlock for my game which uses raycasting and I want to use FindPartOnRay to basically have a bullet mark whenever I shoot, it works but the issue is if the player is moving it has a higher chance of never reaching a part. Also sometimes it's left in the air due to the way it's coded but I don't know how to change it to ignore the player and find out if there's a part where it's hitting..

Here's my script lines 45-52 are the main one's I'm looking at just posted the whole thing to give people a better idea of what's going on..

--Configuration
local reloadtime = 1 -- time in seconds
local damage = 100 -- damage 1:1
local flash = true -- set true if you want pointlight to be enabled
local tk = false -- set true if you want to be able to kill teammates
local Distance = 75 -- Calculated in studs
local brickColor = BrickColor.new("Dirt brown")






--Variables
local version = "1.4.0 Fixed issues with configuration's Config will now be found within the gun script."
local tool = script.Parent
local player = game:GetService("Players").LocalPlayer
local halt = 0
local col = script.Parent:FindFirstChild("teamColor")

print(version)
tool.Equipped:connect(function(mouse)
    print("Tool equipped!")
    script.Parent.teamColor.Value = player.TeamColor
    mouse.Button1Down:connect(function()
        if halt == 1 then
            print'reloading'
        else
            halt = 1
        print("Mouse pressed!")
        local ray = Ray.new(tool.Handle.CFrame.p, (mouse.Hit.p - tool.Handle.CFrame.p).unit * 300)
        local part, position = workspace:FindPartOnRay(ray, player.Character, false, true)
        script.Parent.Handle.PewPew:Play()
        local beam = Instance.new("Part", workspace)
        beam.BrickColor = BrickColor.new("Black")
        beam.FormFactor = "Custom"
        beam.Material = "Plastic"
        beam.Transparency = 0.25
        beam.Anchored = true
        beam.Locked = true
        beam.CanCollide = false

    local distance = Distance

        beam.Size = Vector3.new(0.3, 0.3, distance)
        beam.CFrame = CFrame.new(tool.Handle.CFrame.p, position) * CFrame.new(0, 0, -distance / 2)
        local hit, position = game.Workspace:FindPartOnRay(ray, player.Character)
        local p = Instance.new("Part", workspace)
        p.Anchored = true
        p.CanCollide = false
        p.BrickColor = BrickColor.new("Black")
        p.Transparency = 0
        p.FormFactor = "Custom"
        p.Size = Vector3.new(.2,.2,.2)
        p.CFrame = CFrame.new(position)
        local d = script.Parent.SmokePartHandler:Clone()
        d.Parent = p
        d.Disabled = false

        if flash == true then
            script.Parent.Flash.Flash.Enabled = true
            script.Parent.Flash.Smoke.Enabled = true
            wait(0.1)
            script.Parent.Flash.Flash.Enabled = false
            script.Parent.Flash.Smoke.Enabled = false
        end 

        game:GetService("Debris"):AddItem(beam, 0.1)

        if part then
            local humanoid = part.Parent:FindFirstChild("Humanoid")

            if not humanoid then
                humanoid = part.Parent.Parent:FindFirstChild("Humanoid")
            end

            if humanoid then
                    if tk == true then
                if game.Players:FindFirstChild(part.Parent.Name).TeamColor.Name ~= script.Parent.teamColor.Value then
                humanoid:TakeDamage(damage)
                else
                humanoid:TakeDamage(damage)
                    end
                end
            end
        end
            wait(reloadtime)
            halt = 0
        end
    end)
end)