I also have a 45 Colt 24" octagon barreled Rossi made in Brazil. It is rough as a corn cob. Just yesterday, I completed the tuning mods by www.stevesgunz.com
. While it runs better, it is still rough.
If you are set on a 92, look at Chiappa firearms
made in Italy. While it is a tad more expensive, the fit and finish are supposed to be much superior to the Rossi.