[John Rogers]

The movement of the front sight on any gun, weather pistol or rifle causes opposite reaction to impact. I.E. raise front sight then impact goes down and visa versa. On my muzzle loaders with sights similar to the ones on a pistol usually require the front sight to be shaved or filed to make a 50 yard impact exact. It is easy to do, clamp the barrel in a padded vise so no scratches occur and use a fine file and file the direction of the barrel. Always file from the breech end towards the muzzle end so there is no chance of accidentally scraping the barrel top.

Final item to think about, the impact point of a laser dot will in most cases not match the bullet's impact point, depending on the powder load. Soooooo file a little, shoot it, file a little, etc.