Evening chaps. My recent experience of shopping for a Blaser barrel with my friend and also previous suggestions that I could have two actions but one stock to travel light have got me thinking, what other calibres could I get on an action that fits my CZ550 .416 Rigby stock? Is the magnum action the same and just the bolt face and magazine lips changed for the .375H&H based rounds or do I need to look at something based on the .416 case? I think instead of looking into Blaser I may well get a second barrelled action made. Obvious answer if I can't change bolt face size is a .338 Lapua. What are your thoughts please? I'd like it to be a fairly widely available round, nothing too obscure. I'm also wondering if the Lapua round will be restricted in some countries as it's a military chambering?