I primarily cast bullets because it's so cheap it lets me shoot _a lot_ for very little cost.
I don't expect or need long-range accuracy or humane killing performance from them. There are plenty of excellent jacketed bullets available that exceed those requirements when I need them.
I just tumble lube with Alox, gas check, load them up and shoot them.
I have been considering the method of standing the bullets in a pan of melted lube, letting it set and then punching the bullets out with an unsized case with the head cut off. But when it comes time to do it I remember why I'm casting them and that even that is too much work to warrant on them

A lube sizer sounds good but I don't want to size the bullets just to be able to lube them.
Powder coating for me is way over the top. I've used powder coated pistol bullets and liked them, but it makes even less sense to put that much effort into very close-range, high-volume, low-velocity cardboard killing. If I wanted to consistently shoot them at 2500fps+ I'd probably consider powder-coating to further minimise leading, but I prefer to spend the money on jacketed bullets for that sort of performance.