I own and load for a standard Rossi 45 colt and they seem to take pressure very well, I load Ruger handloading data and seat the bullet out to their recommended COL feeding no issues, I have some room to spare as well. I normally shoot 315gr cast bullets at 1600 fps, that's about all I want from a curved steel butt plate.
If you read some articles or source up Poco Kelly write ups and testing the 45 colt in a Rossi M92, it will be eye opening, he was shooting better the 1600 out of 300 gr bullets. I believe factory 454 from a pistol is around 1600fps add an other 200-250 from a carbine.
standard Rossi 92s are a strong rifle.
Interesting read....
https://www.leverguns.com/articles/p...ltlevergun.htm