I know what you mean guys!
I can go out on one of my permissions to shoot a few corvids with the shotgun and can almost guarantee that I will see at least three or four roe deer just standing there offering a perfectly easy broadside shot. But if I go to exactly the same permission with the 270 the only thing that I normally see is a few white rumps bouncing off some 300 yards or so away.
It's as if the damned things know they're safe when I've only got a shotgun. Smart arsed little buggers!