I had M1 turrets put on my 3 x 9 at Leupold. I shot it in 0 at 100, loosend allen screw and turned knob to 0 but there are still 7 horizontal lines showing above the base. I assumed I would be able to loosen screw, turn untill all lines disappeared and on zero then retighten screw. I'm shooting a 300 BLK with 240 grain bullet and need approx 25 clicks from 100 to 250. Is their any way to set it so I don't have to count backwards from my 250 zero to get to my 100 yd zero with these turrets?