My Big Five in 470NE was regulated by Krieghoff with Norma ammo which I believe is their standard practise. When I visited their factory to order my rifle I shot a 470 that was also regulated with Norma but for the 500NE that I shot they used A-Square ammo or at least brass. I was asked if I was happy with Norma for regulation and since I was that’s what they did. I’m not aware of any other European made NE ammo and I suppose this is the easiest thing for them to obtain. Also my rifle came with regulation targets which mention the ammo details. Perhaps you’ll receive these as well.
