Reset the elevation turret to factory.
Back out both zeroing setscrews on the elevation turret (backed out at least 1 full turn), ensuring that the elevation turret is silent when you rotate it? It should be silent with the 2x set screws backed off, if not loosen a bit further and try again.
Once it's silent, with the 2x set screws loose rotate the elevation knob all the way up to the second revolution (yellow in the windows), stop at around 26 mils. Ensure that you keep light downward pressure on the knob while you do this. Once you get to around 26 Mils total gently snug the set screws back down
You should now have full travel back in your elevation turret allowing you to rezero and set your zero stop.