This is where I went today during lunch to acquire my 4F Goex
I don't know why I have never been there before.
Picked up some Primers and spent a few minutes admiring the collection up on the walls.
You might try Molly’s Place in Kennedyville, Md. Great place and reasonable prices.
That's where I get my powder, and from the Baltimore area it's closer than I am. Otherwise, I'd ask how much the OP needed.
140/80
Oh, sorry, I thought you were looking for Blood Pressure south of Baltimore.