Warning. If you are using one of those lasers that simulates a shotgun shell that you put into the chamber.....it WILL lie to you. Want proof?? Mark the laser with a magic marker every 90 degrees. Then rotate the position of the laser and note where the laser points relative to your front bead. It'll be all over the map.Shim is set for right hand cast. I put a 3/8" gel pad on it which, along with raising the comb, gave me more cast off. If I cant the gun alittle toward me, the laser is spot on. I'll pattern it and try a round of skeet with it tomorrow.