Since COVID 19, pretty much whatever you can source. I did like Hodgden Triple 7, but looks like I now favour Hodgden Pyrodex RS or Hodgden Select Pyrodex RS, which looks to be a promising choice going forward. Black Powder will keep you honest until you sort out all the particulars and then you can migrate to semi-smokeless. Black Powder will build some confidence. My experience with straight-wall cases is that most seem to be a compressed powder charge.
Yeah, just get a small hand sprayer of Oxy Clean and a glass Ball jar with lid & seal. Drop the cases in the Ball jar with the open end up; squirt a dab of Oxy Clean in each case & fill with water. Shake virtuously after shooting effort. Then do the final prep @ home.
Serbus,
Raimey
rse