“In this kehilla, the butcher is oisgehalten.” (Weiser)

“His shita in kashrus is oisgehalten by all the modern teshuvos.” (Weiser)

"If someone has a minhag which is ‘oisgehalten’ (based on a solid source i.e. not a minhag shtus) then it is preferable to the generally paskened halacha." (source)