I purchased the "One Ragged Hole" sight for my S&W 686. And my Rugers: Blackhawk, Single Six and 22/45. The accuracy improvement (for me) was considerably better. If I could, I'd put them on my other auto's. Keep in mind, my eyesight is not as good as it was twenty years ago. So, the 'peep-hole' concept works. I even changed my lever action Marlin to a 'peep-hole'. I do believe however, that this particular sight design is liked by many and not so great for others. If you are having trouble with sight focus, what can you lose. It's very simple to change. If it's not for you, return them.