You , from your description, have a #2 Ballard. This is a cast actioned rifle, only made in pistol cartridges. Biggest one was 44-40, supposedly. In 40 years, I have never seen one in 44-40 except for a #4, which is a forged frame. I'm an avid Ballard aquirer. In my opinion your pushing the limit at 40-60 Maynard. Use Black powder only if your going to shoot this one. And the lightest bullet you can find. Maybe the projectile that the .41 mag. uses. Don