Ummm, yeah, .the .327 Federal Magnum has been chambered by Ruger in three distinctly different revolvers. Charter, Taurus, Freedom Arms, Bond Arms, USFA all have also chambered it.
Attention Brass rats and other reloaders: I really need .327 Federal Magnum brass, no lot size too small. Tell me what caliber you need and I'll see what I have to swap. PM me and we'll discuss.