MidwayUSA has the lee, redding, and forester dies the last time I looked. I've had my 300blk for a few weeks now and it is very nice. I invested some funds for the Harbor Freight cutoff saw, a Hornady case trimmer, and some H110 powder. I have only loaded 147gr bullets so far but they have proved to be accurate and reliable.
It takes a while to convert your own brass but I enjoy reloading so I don't mind. 10+ years of reloading and I still have a single stage press!
I use Lee dies to seat and crimp but Forester to reform and deprime. I got cases stuck in the lee die and the last one was stuck to the point it could not be removed.
For the winter, I hope to get a bunch of once fired brass to convert. There are some places that sell 125gr bullets cheaply so I would get those over the heavier 147.