I'm sure if you scan through these post you'll see where a lot of people have posted their results of using the Rhino/Nitro combination. This link [link]http://forum.hunting.net/asppg/tm.asp?m=1032982[/link] is to a post I put one of my pattern photos on but like BuckAlley said. you'll have a tough time getting through to them now seeing they're so busy. I ordered my shells in late Febuary and they took almost a month to get to me. You might have a better chance trying to contact the people they have listed as dealer to find the shell you need.
What gun are you hunting with? I know from a friend that if you are using the new Mossburg 12ga turkey gun with the 10ga. back bored barrel, you can get an awesome pattern using the factory tube with Nitros. Saves you on the Rhino tube cost

Good luck