Found this used so bought it. Has not been fired much, at least with a bullet because it still has bluing inside the barrel, no rust, no pits. Looks like it has been in storage since the 80's. I have some questions because the person I bought it from didn't know anything. I'm assuming this is a .577 bore not .580 because the .570 RB and .018 patch I put down my GM 58 barrel did not want to go and the .575 new version Minie's I have just fit. With lube they should ram down easy enough. I think these were imported by Navy Arms until about 1980. There is a wide variance on rate of twist with the Zouave reproductions. Anyone know what the twist of this Italian version might be?