Congratulations on your find. When I taught at the FLETC, the Federal Bureau of Prisons used the various Ruger "P" series D/A only pistols in 9mm as their standard issue handgun. We kept a large number of these pistols for training / qualification by the numerous BOP classes that came thru. The D/A only trigger pull on these pistols was pretty darn good.

Lots of rounds thru lots of guns, and I can say they were nothing but reliable and combat accurate. Sometimes more so than the other "big name brands" used by other agencies. Only issues I ever saw was the magazines tended to be fragile if stepped on, and some pistols would suffer chipped extractors with a lot of use. A very under rated pistol.

Larry