Yesterday I bought 8 cases in 577/500 No. 2 BP Express. I really only wanted one of them because it was headstamped Rodda Calcutta and it took my fancy. The rest are all balloon head cases with early boxer primers headstamped Eley. So they're neither Kynoch nor berdan primed but if you're making up dummy cartridges, collecting or they're of any other use to you, you're welcome to a couple of them.