If you are wondering what the range of elevation adjustment might be, well . . .
In this photo, that rear sight has been elevated by 1.25 inches from its lowest position. With my specific sight mount radius, that is just over
200 MOA.
That may look and sound ridiculous to you, but remember:
1. All adjustments on an Old West era scope are EXternal.
2. Buffalo rifle calibers have incredibly high trajectories at long ranges. Remember the height of the tang mounted ladder sights you have seen? They have the same "issue" as my full barrel length scope: the longer the radius of the front and rear sight mounts, the finer the adjustability, but the higher the rear sight has to be able to elevate to get large MOA adjustments.
Time for a little quality control story:
At the rear sight, notice in this photo the U-shaped frame that carries the block of steel that holds the scope tube:
The block labeled "Malcolm" slides up and down in the U-frame to change the elevation.
The first U-frame that came with my Sliding Mount kit was slightly out of tolerance. Its "ears" are supposed to be a consistent distance apart that has just enough clearance between it and the scope tube block to enable the block to slide up and down smooooothly as you turn the elevation screw turret. My first assembly did not slide smoothly when I got above about 1" (160 MOA) of elevation. I measured the distance between the ears, and sure enough, it was slightly smaller at the top of the ears than at the bottom. Someone made a CNC setup error.
I informed hi-Lux, and sen them photos of the discrepancy. They immediately said they would send a replacement U-frame. Somehow that initially-promised U-frame had not yet shipped when I followed up 2 or 3 days later. Hi-Lux was a bit embarassed, but their remedy was dramatic: They then sent the replacement U-frame out via FEDEX 2-DAY service! They sent it on a Wednesday from California, and I received it early Friday afternoon in Lethbridge, Alberta, Canada! And the replacement U-bracket made the movement properly smoooooth throughout the entire 1.25" adjustment range.
Talk about great customer service. THAT's the kind of warranty service you like to receive, but so seldom do.
Jim G