Could the triggers have been cast or milled but then not cleaned up after? I've seen some firearms come new from the factory in IMO BAD condition (Friends' Walther PPK/S some years ago, 22# DA trigger, we stoned it clean and was more like ~7# after that? Lots better anyways.) Burrs will make a trigger obnoxious! And a friends' Thompson 45 (SA version) was maybe worse but he just ran 500 rounds through it to clean it up.