No, although I think it's a pretty cool cartridge.
Due to brass availability and cost here in Canada, I've stuck with the various .45 cases, although I do use a .40-65 for silhouette and it's a pretty sweet cartridge.
Chris.
I have an original Sharps in 44-77. Being too frugal (some might say cheap) to buy basic brass, I used a shortened and necked down 45-70 cases in it. The base balloons a bit but if you only neck size the shells, that should not be a problem with black powder loads.
cheers mooncoon