You are obviously correct, but hell, I had no issues with my 454 Casull Ruger out of the box and that is where I'm coming from.
Jack builds the grips to fit your hand precisely, from a tracing of your hand. The grips will fit the grip frame correctly. What most do not realize is a properly fitted set of grips makes the recoil Less abusive to the shooter. Those that use factory grips and have never used a set of grips made precisely to fit your hand do not know what you are missing.
