Back around 1998 or 1999, I had an Officers Model H&R I got in a trade. The tang sight was pretty flimsy, though. I only shot it a couple times, and traded it for a Navy Arms Rolling Block Target Model .45-70.
We have a 100 yard long range, single shot side match after the CAS match at the local club. This should do nicely. I was using an HRA single shot 45-70, but it seemed too modern.