No moon clips.
The chamber lets the cartridge headspace on the mouth of the case and hold it in place like it does in an auto-loader.
No, the trigger was not very light. A lighter trigger return spring and some minor polishing helped.
Yes, the action of a single action revolver is a negative for SD but works well as a range toy or a hunting tool. (Fun gun).
Unfortunately there is ANOTHER problem with this thing. The 9mm brass is getting slivers 'nipped' from the mouth of the case.
The slivers keep the next cartridge you try to load from fully chambering.
I've tried factory Win white box, Win NATO, Fed HST, Hornady CD, Win silver tip, all nip.
At first I thought it might be an ammo problem in that I'm finding most all 9mm brass that I reload for auto-loaders shorter than the trim to length. (Brass from factory ammo).
Then I tried to chamber some of my handloads that have worked fine in several auto-loaders.
They will not fully chamber. To tight.
I'm thinking the chambers may be cut to small? Before I contact Ruger yet AGAIN ... I'll measure the chambers to compare against specs.
I'm in no hurry, it's just a range toy, not a SD tool... And .357's work well.