Had mine for almost a year,
I have run lots of FMJ, factory and handloads. I have also shot Hornady Critical Defense, Federal Hyda Shok, Cor-bon HPs, Winchester Silver Tips, a bunch of Remington 124 +P Golden Sabers and a bunch more assorted HP ammo.
With over 5000 rounds through it I have never had a stoppage.
You are correct about shooting what you plan to carry to make sure it functions but after that your shot placement will be more important than what bullet you use.
That being said I really like the 124grain +P golden Sabers, I have done some tests and got great results, plus my gun is very accurate with them. I have posted the results before but here they are again. 9mm shot from the Ruger at 21', into gallon milk jugs filled with water and newspaper, with a T-shirt and insulated pleather jacket on the first jug.
Almost forgot, congratulations!
I love my SR9c, it is a great gun, reliable, shoots great and very easy to carry. It is a vital part of my CC arsenal.