I can't offer much on the model or round but I have a mag pug and love it. I live in CT and have visited Charter Arms. Once by invite and while their was given a tour of the facuility by the owner and also got to fire the bull dog, pink lady (wife was there so..), and mag pug. The owner is a down to earth guy who takes care of his employees. He also very much cares about the products they make. Everyone one I met were super friendly and all smiled and then thanked us for visiting them. Really good people.
After that like 15 minutes after leaving I went and purchased my mag pug. I went back prior to firing the mag pug as I had a question on if I could use lead away cloth and brass brushes on the finish. I sent an email and they invited me back to ask the gunsmith directly. Well next thing I know my gun went in the warehouse, my wife an I got to hang out with the owners dogs (including Boomer), and my gun came back rebuilt and polished. Gunsmith said his OCD got the best of him and felt like doing it like it was one of his. Gun looks perfect, tight, and accurate. I have run both 38 special in both 125 and 158 grain and 125 grain .357 mag through it with zero issues. Again really good people.
Needless to say I am a Charter Arms fan.