Question about Beitstad to America

My great grandfather arrived in America in the early to mid 1880s. I don't know the exact year. He lived in Beitstad, North Trondelag. His name was Karl (Carl) Hammer which became Charles Hammer in America. Can anyone tell me which port he most likely departed from and which one he most likley arrived at? Hopefully, that will help me find him on a passenger list.