WOW!!! That is some real info you posted there, I guess I am going to have to see about getting the book.
I have been thinking about putting the M48 in the back of the safe and getting a Taurus 641 to plink with, therefore saving the M48 in like new shape for a grandson. Yes I know it is blasphemy, but a S&W 641 is just too expensive to be a plinker even be it used.
By the way the 22 LR cylinder has only had maybe 18 to 24 rounds fired through it and I did that the first time this past spring.