Let me make it clear that I do not have a 929, and the photos are of .38 Super ammo, not 9 mm. However, the clip manufacturers market the clips as fitting both calibers.
So I decided to see how some 9 mm ammo would fit in the S&W clips. I had some R-P 9mm ammo. The 9 mm fit horribly in those clips. Very loose almost to the point of falling out. Easily inserted and removed with fingers only. I should note that the arms on the S&W clips are shorter than those on the TK clips.
Tried the 9 mm in the TK clips, which were difficult in which to insert and remove the .38 Super ammo. Worked much better with the 9 mm. Still not rigid, but at least secure in the clips. May be acceptable for competition, even with the flop, due to the short cartridge length and RN bullet.
I think the only conclusion we can draw from this is that it will require a lot of trial & error with different clips and ammo to find which combination works best for you.
Adios,
Pizza Bob
The moonclip that I received with my 929 from Smith is the same as the blue stamped blue moon clip from TK.
The blue stamped moon clips work with all misc brass that I have tried. If you have special brass requirements call TK and they can help you out.
I have over 7k 0f REM 9mm brass that I will use for the 929. TK was able to send me the required EDM stainless moonclips to fit that brass. But the misc brass does not easily load in the Stainless moon clips (too tight) even with the BMT tool.
Tom