I have one of those handguns and like someone else pointed out, it is not very common. It is actually a limited run item made for Accusport and I bought mine in a local shop about 4 years ago. I really like the Bisley grip and had been wanting one with something shorter than the 7.5" barrel on my SBH. I also had been wanting a Ruger in .45 Colt, primarily because its a caliber I did not have yet. Personally, I had no interest in the 45ACP cylinder. Great pistol, however if you plan to shoot cast bullets, I would recommend spending the $30 or so dollars and have the guys at cylindersmith.com clean up the throats.
My hunting load consist of a 300 grain Beartooth at 1213 fps. Accurate, comfortable to shoot in the Bisley and the last hog I shot with this load, I hit in the jaw and even with a complete length-wise shot, it still exited.
Brian