Priestly Old Believers or Popovtsy are those Old Believers who in principle consider such churches who have adopted the ritual observations rejected by the Old Believers to be schismatic, but not necessarily heretic. All Old Believers consider the practices of the post-Nikonitan Russian Church and other similar churches to have a ritual observance alien to what they consider truly Orthodox. However, the Popovtsy do consider it possible to receive "new ritualists" with myrrhon, since Popovtsy discern between heretics and schismatics. As a consequence of the fact that some priests never accepted the ritual changes and had kept myrrhon consecrated before the schism, which could be mixed with olive oil, the Popovtsy received Nikonians with myrrhon and sometimes also got the opportunity to receive priests and finally also Metropolitan Ambrosios of Sarajevo, which enabled them to establish an episcopal hierarchy.
Some Popovtsy accepted the "edinover" Church which is a branch of the established Russian Church using the pre-Nikon rite, but the majority of Popovtsy never accepted this, since they consider the post-Nikon Church to be schismatic and thus not Orthodox, although not necessarily heretic.
On dogmatic issues Popovtsy differ only slightly from "conservative" Nikonians. One difference is that Old Believers always baptize converts from the Roman Catholic Church since this Church is considered heretic.