If you have a scope adjustment that gives a 1" change in point of impact for each click @ 100 yards, it will give 1/2" (0.5"

change @ 50 yards, and 1/4" (0.25"

@ 25 yards, etc. If you have a scope with a 1/4" (0.25"

click, it will take 8 clicks to move your POI 1" @ 50 yards, and 16 clicks to move it 1" @ 25 yards.
Keep yore powder dry!!