I have a Ruger single action Bisley 45 Colt. I noticed that there was a bit of a gap between the metal of the grip frame and reciever. I did some investigating and removed the wood grip panels. I saw that the two allen head screws that attach the grip frame to the reciever were quite loose. Naturally I removed and cleaned the screws and then reinstalled them with a dab of loc-tite. I am wondering though if the loose screws could have been some of the problem I have been having with large groups. I will shoot it again soon (hopefully this evening) and should find out but was just wondering if that would likely have much impact on group size. Thanks, Brian C.