We used to have a customer that would order these types of rifles when I worked at an indoor range here. Some take downs and others like this. All huge calibers. He always asked us to fire a few rounds out of it at 25yds for him just to check it and the sights before he took it. I don't remember if it was a .416 or not? It was a .4 something
but I fired two rounds out of it and that was enough.