I took my 1922 Springfield out for some long range trials. The slide on mine is marked to 125 minutes (At least I think they are minutes.) Much to my surprise, the slide came free after 80 minutes of elevation. The elevating screw came to the end of the thread and just popped out.

Question: Do other long slide Lyman 48s have elevation screws that would allow the full use of the slide? One would hope so, else why make the long slide?