I get powder from these guys, they've been awesome so far.
https://www.prismaticpowders.com/canada
The Lee dies work awesome for powder coated bullets, they can seat gas checks too if needed. Part of why I wanted to experiment with pc wasn't just that its much cleaner, reduces lead exposure, and reduces equipment costs by allowing you to get away from lubrisizers but many guys claim it reduces the need for gas checks. Shooting a gc bullet thats been pc'ed is still going to suffer accuracy issues but using plain base molds opens up a few options. I haven't been trying to hit max velocities, just shooting light loads for cheap fun. If you're shooting targets at known ranges high velocity is a waste of powder and shoulders.
Some guys don't like it, thats understandable, but personally it works. Theres a few YouTube videos of guys doing various lube comparisons, care in each of the steps seems to effect accuracy more than the method used.