There's a thread on it somewhere but if the reticle was turned up to what we normally would expect it would wash out the target. Jerry at S&B changed the rheostat on his personal scope with (if I remember correctly a H59 reticle) and indicated it became unusable with the stronger illumination and had to change it back. I had called about the relatively dim power of the illumination and he indicated that he would/could change it for me but shared his experience and advised against it.