I have watched many videos and read many articles on proper finger placement and the general consensus of what I have seen is to put the pad of your finger on the trigger. I have spent most of my life using the crease of the first joint on my finger and have shot OK. But, I thought perhaps I could improve my shooting so I decided to try the pad, though it does not feel natural to me at all. I bought a Ruger Bearcat .22 a year ago, and have had problems with it shooting left. I thought it might be the ammuntion at first, but got the same results no matter what I used. Today I decided to try the Ted William's approach. Williams was perhaps the greates hitter in the history of baseball, and once made the comment that if a player is hitting the ball, don't change anything, just leave him alone. So today, I went back to the crease squeeze, and lo and behold, the group tightened up and was center of mass. Just my experience. It may not work for you. I do fire my Ruger Redhawk .45 Colt using the pad of the finger and most shots are centered, but when I miss, it is usually left. Believe I'll try the crease next time.