Got a NXS 8-32x56 scope a while back. In setting the zero stop I TRIED to set at 600 YDS (My normal zero) but I had less elevation available to go to 1,000 yds ! Help !! Explain?? To settle any Q?... using on a T2K 30" with Burris Sig rings and a Miracle Machine Gantry Mount. I went & set Zero for 100 after making sure it was zero... however, I shoot 600 > 1,000 yds so after doing a 100 Zero I have to add to 600 and then carry on. Is this normal or what ?