Thanks Ted, for your generosity in sharing information! I will test fire at week's end, and will be happy to report. I most likely will be content with a 2.5" shell. RST does not make the 00 buckshot load that my range requires for firing on site, but they said that they would direct me to another manufacturer that also used paper shells. While I have no experience hunting, I now live more rurally than I have, and have seen frequent bobcat and coyote, so the Darne may well serve a utilitarian function at some point.
With best wishes!
Ben