..and stand developed expired XP2 (shot at 200, 1 hour in rodinal 1+100)
Frank is absolutely right. There reports that the camera was optimized for wide open, I try to shoot it that way. It's my ultimate low light machine!
Isn't XP2 C-41 ?
Yes, but you can cook it in rodinal just as well. Like almost any other film, even kodachrome (you won't be getting the colours, though).