I think that a .416 rimless would be a great choice for a "high quality" DR. I use a rimless .458 in a new sidelock Beretta. I returned from a two week hunt in Africa three days ago. I shot a buffalo, waterbuck, and blesbuck with it. I have never had any feeding or ejection problems. I know that rimless is not traditional. When I get killed using it, I will have my widow post a retraction