I used to have one of those, nice gun, traded it off for a Jap Arisaka rifle. I also had the CVA deringer, the copy of the gun that was used to shoot President Lincoln, also in the same caliber.
The barrels on those pistols must have been pretty good as I gave the CVA deringer to a friend to pay him for some favors and he proceeded to over load the gun for laughs, I thought he was crazy and stayed away when he fired it off. The gun took it though, which amazed us all, I don't remember the charge that he used as it was in the early 1980's. I do not recommend that anyone over load their guns, and this way the hobby will be a safe activity. The guy I traded the derringer to later had a nervous breakdown. He told me he sold all his guns, became a pacifist, and I have not talked to him since 1983.