Winchester has dropped the 7mm stw from their production. I have not been able to find anyone that still has it on the shelf. Remington now produces 7mm stw brass seasonally. Not much of that around either. You'll have to stock up when they make a run. Nosler has announced they are producing 7mm stw brass. As of a week ago or so it is not yet available and it will be expensive.
"Fenced yards ain't hole cards and like as not never will be, reason for rhymers and old five and dimers like me."