Using an Israeli sidur (prayer book) nusach Ashk'naz recently, I saw that it had "Sim shalom" for mincha of Shabas (including Shabas yom tov, but not weekday yom tov), even though it had "Shalom rav" ...
Nusach Ashkenaz says Shalom Rav at Mincha most days. However, when there is Birchas Kohanim (such as a fast day), they say Sim Shalom. Is there a connection between Birchas Kohanim and Sim Shalom? If ...