Ace 1858 44 revolver what's a 3 inch barrel

this is a Peta Ace 1858 44 caliber revolver it's a copy of a Remington 1858 I'm shooting a 200 grain bullets that I make from a Lee mold there a .450 diameter bullet which is a conical and a lot harder hitting and more devastating then the traditional round ball also is shooting Jim Shockey gold 2f powder for rifles instead of the 3 f Jim Shockey gold powder that I normally shoot just for an experiment it shot okay but had a hell of a kick as you see on the video.