Thanks! Just realized that for whatever reason, my G30S came with high sight, instead of the standard one. swapped it with a standard sight I forgot I have(from my G22 on which I installed fiber sight). still pretty high @ 25 meters and I had to aim at the very edge of the letter size target which is hard to reference. I think for now I will just file it down to 6.1mm which is the lower glock sight height. within 15 meters, 6 o'clock hold is quite ok.