nase:
Permit me also to welcome you to the Forum.
The only time I have ever run 50+ rounds through my R9 was during its first outing -- and I recall that my right hand started "complaining" after about the fifth magazine or so.
The R9 is the smallest and lightest pistol yet produced for the 9mm Parabellum cartridge, and I personally consider it to be the finest pocket pistol yet made. It is designed to be a close-quarters self-defense weapon. As such, having proven to myself that my R9 is fully reliable, I now carry it every day, taking care to keep it immaculately clean and properly lubricated, and running a magazine or two through it every now and then in order to maintain familiarity. For extended range work, I've got 1911s that I can shoot for as long as the ammunition lasts.
Good luck with your new masterpiece, and welcome again to the Forum.