777 makes its own lube by product. I think Pyrodex may too.
I don't see a problem with your large pistol primers. If you were using 777 I might think about magnum primers since 777 is harder to ignite but you are using Pyrodex P. I don't know much about Pyrodex but I thought it ignited just fine.
Next time you and me go shootin, I'm gonna load yer 1911 with black powder loads, an then me'n Hoss gonna stand off to tha side and snicker.....heh heh
Hawg ...was hopeing you got your guns back ...sorry it hasn`t happened .