Best way to break in brakes?

[kxnomore]

Just re-did the rear wheel brakes, bearings, and turned the hubs/ drums on my 71k20 rear brakes. It has the Eaton 14 bolt deal with the 12 X 2 shoes.

Long story but the bearings were very dry and when I tried to press them out to grease them they powdered apart on my bench. After 3 tries at various parts stores, we finally got the correct parts and things are looking much better.

the problem is the brakes now feel weak and the parking brake no longer holds even though it's adjusted very tightly. I put in all new shoes and wheel cylinders and Napa turned the drums. The shoes were adjusted to just barely scrape the drum, but now that the axles are in it's hard to tell exactly what's going on.

could it be that the shoes need to be broken in somehow? maybe they are not meeting with the drum correctly?

Any help would be greatly appreciated. Thanks!