Hello all, my Colt C.C.O. is shooting about 3inches low at 15 yards. I have shot both defense and the 200gr SWCL at 800ft/sec; and the impact for both is the same "low". Got a guru at the range to try and he shot to the same place, "3 inches low at 25 yds. It does this with any ammo involved. He said "I would have to replace the front site with taller site". The sites on this pistol are factory and non adjustable, and I do like the sites and I hate to change the original pistol. It doesnt look like Hienie's or Novak's would fit this particular site arrangement. Any help, suggestions, or simply a reply is appreciated. Sincere thanks Greysky