In my opinion, RUGER made a mistake by dropping the Security Six. It was meant to compete with the S&W model 19, but is a stronger gun with only a barely noticeable weight increase. I can use the same holster for the model 19 and the Security Six.
I have had several and the blue 4 inch is my favorite and one of my favorite revolvers. I bought mine use when a gun shop employee showed to to me. They wanted $349.00 for it, used. It had PACHMAYR Gripper rubber grips. Not a real beauty, but the trigger had been worked on and was so smooth, I bought it on the spot and took it to the range. It shoots well, firing any .38 Special or .357 magnum load.
If RUGER ever put it back in production, they should sell it only as a Champion Match style revolver, with a properly smooth trigger instead of the gritty one on my GP-100's. It would be a match for the COLT Python in desirability, at least to me.
The GP-100 came later and was supposed to replace the Security Six, but never did. I have one of the early stainless steel, fixed sight models with a 4 inch, non- full underlugged barrel. It is slightly heavier by a couple of ounces and bulkier than the Security Six and while a good gun, is not as easy to carry because of the extra weight. The standard GP-100 is too heavy to use as a carry gun, unless you go to a snub barrel, then you lose some of the power advantage of using the .357 magnum round.
No thank you.
Just my experience
Jim