I am not sure whether or not rifle and carbine slides can function on the wrong leaf.

A better clue might be the shape of the sight notches and size of the aperture hole.

The two sights in my photo, carbine and rifle, are different in this regard.

BTW - The carbine (20 inch) and Board of Ordnance rifle (26 inch) barrels did not show the extreme and peculiar drift pattern of the 30 inch rifle barrel.

Drift in the short barrels was less and predictably to the right.

The 30" Krag rifles angled bullets to the, left upon leaving the muzzle. (Harmonics)?
At about 1,000 yards, bullet drift to the right brought the rifle fired projectile back to the center-line. Bullet drift continued to the right, past 1,000 yards.

I don't understand the drift angle used on the 1901 rifle sight. It seems to me the drift compensation should have been like a 'banana curve' - moving the eye-piece to the right and then back to the center and then slowly to the left.

This whole phenomena had to be driving the smart guys at Springfield Nuts!