Well since I figured out my need to seat/crimp separately I set about tracking down a crimp die.
40 websites later I was empty handed. Even searched eBay. Then I started searching just part numbers, and found one on eBay listed by the part number by a seller who clearly doesn’t know what it actually is. As a bonus it came with a Lee expander. Not that I need that, but still.
Okay, rounds are burning clean now, but still having issues with bullet setback in the magazine. I had loaded them to the point where I couldn't press them in, but I worked with the lightest crimp I could to achieve that.
So, I tightened the crimp a bit an will try some more.
No other issues, and its cycling well. I got whacked in the firehead with a piece of brass that drew blood, lol.