They are very slow but if you only shoot a box of rounds per month they will do. Those loaders were great back in the days before TV.
I have used them and they work. But a caution, they only neck size the cases. This is fine if you have only one gun in that caliber. But if the shells were shot in one gun and loaded with a Lee Loader they might not chamber in a different gun.
Just walking on the edge of of my grave.