No, I didn't get the Ritterbush from Griffin & Howe. It was a nice looking rifle though. I just got off the phone with JJ at Champlins and have decided to go with rechambering to the 450 3 1/4 on this one. That is, IF, it passes muster. I believe I can also use my .458 Win Mag bullets I have in stock, excluding the solids, in the 450 3 1/4 if I am not mistaken. Please correct me if I'm wrong here. Now I need some loading data for the 400 grain and 500 grain bullets. Thanks, Mike