It hasn't been shot in my life time. My father recalled it being shot at a family gathering back in the 1920's when he was a boy. It's missing its rear sight but is otherwise complete, uncleaned and unrestored. I wipe id down about once a year with CLP collectors and Steinway furniture care.
It's in .54 caliber and is more appropriately a "plains rifle" and yes, it does have PA/KY elements as well as Ohio in it's design.
It's fairly ornate for a rifle of the period, especially for Browning. When considering the original owner was a prominent citizen of Nauvoo at the time and preparing to migrate Westward, it's probable the embellishments were made at his request when the gun was ordered.