Since this is my 1st post, I'll try and keep this short and simple. My wife recently aquired her fathers 1953-72 era Ruger Single Six revolver with both the .22 and .22/magnum chambers. She has limited experience with this gun from her days living at home, and remembers her father mentioning that this gun -HAD NOT- recieved the safey upgrade he was notified of many years ago. What upgrade? I found a pdf manual on-line, and it simply states that one was available for those guns with the serial N0# below 62,00000 and this one is well below that, but doesn't say what the upgrade was?
She plans to use this gun when we shoot at our local range, I'm just getting started with my Beretta 92 9mm, and admitedly have limited experience with revolvers (I started shooting with her brother's Ruger .22 MarkII ), what should we watch for?
Any insight would be greatly appreciated.