ND has always stood out in terms of their admissions. To use a more general example, their football team has suffered because they try to bring in top student/athletes. They are a small law school with a pretty solid national reputation. I think they choose people they think will add to their class, much like a small liberal arts college might, though not to the same degree. They choose students, it appears, who have good numbers and either a compelling application or who exhibit a real desire to go there school. Dinging high numbers is not yield protection, they are a good enough school that has remained small and has selectively chosen their law students. I don' think it has much to do with keeping it conservative or Catholic, but that factor might be selfselection of applicants.
All the mid 160s with higher gpas have a good shot. They will choose the ones they want out of those who have good scores. I think they are one of the few schools that actually reads the applications. (hyperbolic, but I think you know what I mean)