SetPrimaryPartCframe converted to moveto lagging?

So i was using primarypart to move the models but its quite sloppy and shaky so i decided to use moveto instead but whenever i try and drag on random area it's lagging like so bad and the script will suddenly not work.

------This is previous script ---------

mouse.Move:connect(function()
    pcall(function()
    if _G.target and _G.down then -- Don't mind the global variable here, i used modulescript now.

        local posX,posZ = mouse.Hit.X,mouse.Hit.Z
        _G.target:SetPrimaryPartCFrame(CFrame.new(posX,_G.target.PrimaryPart.Position.Y,posZ))


end
end)

end)

---------------new script----------------------

mouse.Move:connect(function()
    pcall(function()
    if target and down then


        target:MoveTo(Vector3.new(mouse.Hit.p.X, mouse.Hit.p.Y + (target:GetExtentsSize().Y / 2), mouse.Hit.p.Z))


end
end)

end)

-----check if mouse target is a model and finds the player who owns the model

mouse.Button1Down:connect(function()




    if mouse.Target and mouse.Target.Parent:IsA('Model')  then
        if mouse.Target.Parent:FindFirstChild(plyName) then

         for _,v in pairs(mouse.Target.Parent:GetChildren()) do
        if v:IsA("BasePart") then v.CanCollide = false

        down = true
         target = mouse.Target.Parent
        mouse.TargetFilter = mouse.Target


        end
        end
        end
        end
end)