Making mousehit more accurate?

Ive got an issue with things not really moving towards the mouse very accurately. They will move in the general direction but not where the mouse is aiming, forcing players to aim really low. Is there a better way to send something towards where the player is aiming?

local script:

function Keys(key)
    local Key = key:lower()
    if key == "z" then
        script.ZMove:FireServer(mouse.Hit)
    end
    if key == "x" then
        script.XMove:FireServer(mouse.Hit)
    end
    if key == "c" then
        script.CMove:FireServer(mouse.Hit)
    end
    if key == "b" then
        script.BMove:FireServer(mouse.Hit)
    end
    if key == "v" then
        script.VMove:FireServer(mouse.Hit)
    end
end

(this isnt the whole script but it's the relevant parts)

server script:

            local Lance1 = game.ReplicatedStorage.Fruits.FlameStuff.FireLance:Clone()
            Lance1.CFrame = Player.Character.HumanoidRootPart.CFrame*CFrame.new(1,0,0)
            Lance1.Parent = Player.Character.AttackFolder
            local Lance2 = game.ReplicatedStorage.Fruits.FlameStuff.FireLance2:Clone()
            Lance2.CFrame = Player.Character.HumanoidRootPart.CFrame*CFrame.new(-1,0,0)
            Lance2.Parent = Player.Character.AttackFolder
            Lance1.MeleeDamage.Disabled = false
            Lance2.MeleeDamage.Disabled = false
            local BV = Instance.new("BodyVelocity")
            BV.MaxForce = Vector3.new(math.huge,math.huge,math.huge)
            BV.Velocity = mousehit.LookVector*80
            BV.Parent = Lance1
            local BV2 = BV:Clone()
            BV2.Parent = Lance2

(again not the whole script, but the relevant parts)

Thanks for reading