When you view the 2010 catalog on the website, it shows stainless Blackhawks only in .357 Magnum, but when you click on that (small fuzzy) part of the catalog, it takes you to another part of the website that still lists the .45 Long Colt versions.
I think Ruger is making a mistake on this one. The .45 Long Colt makes good use of the "New Model" large frame, allowing handloads in the 25,000 psi range. The new "Flat top" model with the mid-sized frame allows for 25,000 psi loads in .44 Special, but apparently not in .45 Colt. And, of course, the .45 Long Colt has always been the length of the newer magnun cartridges that the "New Model" frame was designed for.
So, it seem to me that the old "New Model" frame is the best choice for a .45 and the new "Flat top" frame is the best choice for the .44 Special.
So I hope they will just put new lockwork in the large frame and then get back to making them in .45 Colt stainless.
I like stainless best for carry in rough conditons and for shooting black powder loads for "cowboy action". (Why use powder-puff smokeless loads to "compete" for score in cowboy action when you can have much more fun making loud noises and LOTS of smoke for just a few more seconds with REAL black powder cowboy loads?)
SL1