"What I'd check."
I'm still on the ridge. I hope you have the shoe cores but if not, do research and make CERTAIN the shoes are correct width. The lining, even if "spec" to correct width, is likely "sharp cornered so a bit, just a bit, wider than the old. The RIDGES in the drum, BOTH outer and inner, can rub/ wear against the edges of the lining
UNLESS you have replaced the bearings, and somehow gotten an incorrect bearing in the mix, that is a non issue. I would remove the shoes and hardware on once side and do a test fit
I AM ASSUMING that you KNOW how to properly adjust wheel bearings, and that you are not simply "tightening" them down, which could also cause this to happen
Also, with the bearing nut more loose, you should be able to turn and hear scraping and perhaps get some better idea of what is going on.
