I tried to see if a .45-70 brass could fit? .Nope!...I think this one is a .450 Eley. Maybe a .45long colt brass would fit?. I`ll try that later. I might be lucky to fire lowpowered Magtec .45colt cowboy loads in it. I read in Oz these .450 Eley`s in these Snider were called `roorifles`..(think of Skippy)..