I know a lot of folks have posted here about their Winchester 92s and Marlins, but I think it's important to point out that this original poster is concerned about buying a Rossi 92. The Rossi is not the same as a Winchester or a Marlin. These are different rifles, and I shouldn't have to point this out.
I know that we have a very rich and detailed history here on THR about not reading any posts after the first in any thread, but... come on guys, please...
@bernie I regret that I don't have any more of the Thompson style SWCs, or I would give you some detailed measurements and photos.
If you like, I can certainly provide some photos and measurements of my own cast RCBS bullets, but I don't know that it would help you that much. One thing I will point out about the Ranch Dog bullets is that they tend to extend more into the case in order to provide a shorter nose for better feeding. However, that may be exactly what you need.
If you want to try some cast bullets without investing in molds, I would recommend Matt's Bullets. There are definitely others who will send you samples.