I love my Rossi 92. I have heard that some of the Rossi rifles have large chambers, but mine is not one of them.
Some lever actions are fine with the heavier loads that are meant for Ruger revolvers. Since you are talking about one of the stronger actions (a 92 model) you would be safe shooting Ruger loads. As a matter of fact, my Rossi gets occassional use as a short range whitetail gun (using stout loads). The weaker linkage of the Winchester 1873 pretty much limits it to cowboy loads. I wouldn't fire Ruger loads in a 73 even if it were a recently made replica with the strength of modern metals. Besides, it just wouldn't be right!
Jack