I carry daily. I have several Bobergs, several Seecamps, a few other carry pieces, but my daily carry is an R9. This is a trustworthy carry piece but it needs quality care. IMHO the grip screws do not get loose unless the pistol is fired (or at least triggered a LOT on a snap cap?). THUS, IT MAKES SENSE TO ME, to simply tighten the grip screws after each range session, and check them occationally when the pistol has not been fired for several months "just in case". On the range I always have the appropriate equipment in my range bag to tighten the screws after every 40-50 rounds, and I do so when my aged memory allows. I do use Yankee's O rings, but I still find that the screws can become loose after 50 rounds or so through the spout. After cleaning the weapon, oil can get into the screw holes. Occasionally remove the grips and dry the holes with a pipe cleaner, then replace and tighten the screws appropriately.
I have owned only 3 R9's, and after a reasonable break-in and a little learning experience, only one has had a major problem, and that was related to a relatively rare malfunction (due to out of speck firing pin retainer, which a very few other owners have experienced), which Karl repaired at his expense. I now carry this one daily, and the others were without issue including the one I sold to buy the Covert (and which I now wish I had also kept).
Break it in. Give it time. Lubricate it well, but carefully. Hold it tight, treat it right, carry light but ALWAYS find out what premium ammo it likes best, whether Gold Dot, Golden Sabres, Federal Premium, etc. and give it what it likes. If practice ammo occationally jams but costs less, so what as long as your carry ammo always works. Most prefer 124gr or 147gr, but some 115 users disagree. Learn your weapon before you carry.
Shoot safely, shoot well, shoot a lot! This is still the best carry 9mm pistol available. (see my recent post about my new Kimber Solo from today).
Regards,
John