It seems to me that a rifle intended for Berdan Primers should strike the primer slightly off-center (to avoid colliding with the solid anvil in the primer pocket).
It would be interesting to know if 'radio_silences' rifle has Belgian Proof Marks.
I once owned a good quality Belgian made sporter in .577/.450. It was marked the "Mechanical Guns Company" on the left side of the action and had a stylized Bumble-bee logo. The Belgian Proof Marks were evident.