Any ideas?

Fired a 1913 production in .30 WCF today, 3” high at 50 yards, 8” high at 100 yards. No tang sight, elevator in rear sight at lowest level.

Most 19th Century produced or designed firearms I fire are high. And why is that so? No option to go lower on the sight elevator.

it seems dead zero must be greater than 200 yards. But what can you even see at that distance using iron sights?