I have a Colt, Rugers, S & W, and a few Glocks. I was looking at a new gun and a friend told me to go with the Sig P220 with night sights. I have used it indoors and outdoors and had a great deal of trouble finding the target. The last time at the range was a sell it or keep it day. It was a new range with different lighting, to where I feel the night sights were a great help. Both my son and I were pleased with our groups. Any advise as to how to sight in other lights? Thanks.