Almost all of the ammo through mine has been Federal FMJ and some Hornady Critical Defense, and Hornady Custom. I have never had a light strike, and ignition has been 100%. Extraction can be sticky at times, but only after maybe 70-80 rounds without a cylinder brushing. I have been very pleased with my 9mm revolver.
I read most of the comments on this thread initiated over a year ago and must say, I agree with Weblance's premise entirely. It seemed odd why production had ceased on the venerable little SP101 in 9mm. From what I gather (and contrary to the conjecture on this thread), production had commenced in the first place to fulfill overseas demand for ammo commonality with semi-auto pistols and selling stateside was merely a secondary consideration from Ruger and had ceased when these contracts overseas were fulfilled and not necessarily because of any lackluster domestic sales. A lot of guns would have met their production demise if sluggish U.S. sales were the sole consideration.
One likely reason to kill further production of revolvers in 9mm is that continued production would appeal to a customer base who would otherwise purchase a traditional caliber revolver, such as .38 special, etc., thus cutting into ammo sales of those other calibers. Gun manufacturers are beholden to ammo manufactures to some extent or, at the very least, don't want to rile them.
About moon clips: Moon clips are quite convenient, not inconvenient. In Ruger's SP101 9mm revolver moon clips were provided for convenience but aren't even necessary to shoot this model due to rim shoulders inside the cylinder wall to ensure proper head spacing and retention of the 9mm round.
If anything, moon clips are more convenient than the speed loaders that are used with traditional revolver calibers, such as .38 special/,357 magnum because the moon clips stay with the shells in the 9mm caliber and you simply close the cylinder with the rounds in place - as opposed to the need to turn some knob to release the rounds, as is necessary with traditional revolver caliber speed loaders... oh, then you gotta deal with this empty speed loader in your hand before shooting. Therefore, the moon clip is more convenient (and speedier) than actual speed loaders, but I repeat myself lol!
Bottom line: Weblance presents meritorious points here. The practicality of a 9mm revolver are under appreciated and not even understood by many.
"We're all born ignorant, but one must work hard to remain stupid." ~~
"Never pass up a good opportunity to keep your mouth shut." Sir Winston Churchhill