45/70 can be Loaded two ways modern strong rifle, old weak actions. When I owned a new Marlin 1895 used that samr light bullet fast and it was a 150 yard rifle. Most of my 45/70 experience is black powder at under 1300 FPS.

Bullet drop is linked to lag time how long the bullet is in the air. Mostly velocity some ballistic coefficient. Effect is about any 2100 FPS bullet has the same drop. That means the big 45's have 30/30 Trajectory, or very close to it. Power being another thing.

Boats