If the two cases above were fired in this rifle, they don't show drastic expansion, but the photo angle doesn't allow a good view. This is consistent with it being for one of the 11.5mm cartridges with a case length longer than 54mm, but depending on throat a 45-70 may chamber in an 11.5x52R chamber.
Mike

Last edited by Der Ami; 09/30/16 10:18 AM.