I recently purchased a new California sight for the front of my Manton style .40 caliber pistol. I had it sighted for a 6 o'clock hold and decided to try for a poa sight in instead. The California sight is really tall..which is great as it leaves you plenty of height to play with. I sighted it in at 25 yds., and it started at the bottom of the target backing. Just a matter of filing and shooting numerous times until it actually gets to where you want it.