R_H_Clark: That is still good shooting there at 60'!
My favorite targets, anymore, with rimfire pistols are Ground Squirrels from a sandbag window mounted and usually at around 50 to 60 feet distance.
Your description of what to do with a pristine Model 18 ("but I would play with it from time to time") is EXACTLY what I plan on doing with mine.
And in 10 to 15 years the VarmintWife can sell it for some tax free profit after I am gone.
So, this unfired/pristine Model 18 is gonna keep leading an easy life for some time to come.
Among several other things I am thankful for is that I was born and have lived during the era of the 22 L.R. cartridge - I have done more things and had more fun with the 22 L.R. than with any other cartridge.
Hold into the wind
VarmintGuy