Depends on when in the 19th century. Early 1800's... styles were still changing with the times. That continued through the 1850's. It was the Civil War, industrialization, and cartridge firearms that really changed everything. Muzzleloaders continued in Appalachia into the early 20th century. By the 1870's in the north, such as Pennsylvania, I think they evolved to be used more in competitive shooting than in daily use.
