I might just be lucky but my R9 is flawless through 240 rounds of 115gr, 124, gr and 147gr ammo of quality from "junk" to top of the line.
Although the 115gr has less felt recoil in the R9, I prefer the 124gr and heavier bullets for carry, due to better penetration with heavier weights.
I don't normally expect instant perfection from firearms that push the size envelope. My PM9 required a few rounds of break-in before it stopped having intermittent failures. Ruger LCP was the same. PM45, P9 Covert and P3AT all worked perfectly out of the box but I still "broke them in" before I carried them.
What strikes me about the R9 is that the tolerances are tight. That means that, in all likelyhood, some guns will be on the slightly "too tight" side.
I have a routine for a marginally over-tight pistol which is so simple it sounds stupid, but it really does work well.
First I'll clear the firearm, then field strip and wipe off excess oil or grease. I don't use a solvent, just wipe it down with a clean, dry cloth, until the firearm is mostly dry. While I'm in there I inspect it for wear or drag mark. Even new pistols usually have a few rubs on the finish internally from racking or test firing. Note where these are and their general shape and size. Slide rails are a primary concern, but the top of the slide and sometimes the bottom of the dust cover are also potential drag areas. Look it over carefully.
Then reassemble and rack the slide a good 50-100 times. If the manufacturer says dry-fire is ok, then, after checking that it is unloaded, feel free to do so, again 50-100 times.
If the pistol still feels like it is dragging, rack the slide another 50-100 times.
Then field strip and note the marks, are they larger or deeper into the finish? Good, you've worn it in a bit. I've used mild abrasives to help wear in tight pistols, but do so with caution and if in doubt, talk to a gunsmith. Don't ruin a new firearm if you are unsure. It's always safe to just keep racking the slide a few more 100 times to help if polishing compound sounds frightening.
Now strip it again, clean it very thoroughly to remove any metal particles and lube per manufacturers spec's. Try to avoid greases or graphites in very tight pistols. Instead use a light gun oil and use it sparingly. Too much oil can create drag in tight areas. Try sticking two glass plates together with oil in between and see what I mean. It tight areas, less is more. Lightly oil then wipe off any excess. Now go shoot it. It's a far less frustrating and less expensive way to start the break in, and I've found it eliminates a good part of the problems with tightly made and heavily sprung small firearms.
At worst, it can't hurt and it's free to try. You might be pleasantly surprised.