jbinpa59 Posted May 26, 2018 Share Posted May 26, 2018 Anybody have first hand experience with s&w 646 moon clips being used in a 10mm gp100? Seems like the aftermarket hasn't gotten around to that ruger yet . Link to comment Share on other sites More sharing options...
Tampa-XD45 Posted May 29, 2018 Share Posted May 29, 2018 TK custom has them for the 10mm GP100: https://www.tkcustom.com/products/moonclips Link to comment Share on other sites More sharing options...
eggman Posted September 17, 2018 Share Posted September 17, 2018 I realize this is an old post but just recently bought a GP-100 10mm and thought I would share my moonclip experience in case it helps someone else. I purchased a pack of 10 TK moonclips for the GP 100 10mm Match Champion and found the fit was too loose with just about any brass except for Win headstamp. Federal was also loose but would remain in moonclip from holder on belt to cylinder during reload . R-P and Starline brass would not stay in moonclip during reload as I would have at least one cartridge fall out. With Win brass the TK moonclips work great and this combination is my choice for matches . I am using Ruger moonclips to shoot the non-Win headstamp ammo I have already loaded for my 646. Link to comment Share on other sites More sharing options...
perttime Posted September 18, 2018 Share Posted September 18, 2018 (edited) I'd totally missed the 10mm GP100 Match Champion. I suppose it also works with .40 brass (???) https://ruger.com/products/gp100MatchChampion/specSheets/1775.html edit: Oh, the moonclips are different thickness: https://www.tkcustom.com/products/ruger-gp-40sw https://www.tkcustom.com/products/ruger-10mm-x-6-gp-100 Edited September 18, 2018 by perttime Link to comment Share on other sites More sharing options...
eggman Posted September 18, 2018 Share Posted September 18, 2018 (edited) I had missed this too . Probably explains my other issue with the 10mm GP-100. Edited September 18, 2018 by eggman Link to comment Share on other sites More sharing options...
Tampa-XD45 Posted September 18, 2018 Share Posted September 18, 2018 22 hours ago, eggman said: I realize this is an old post but just recently bought a GP-100 10mm and thought I would share my moonclip experience in case it helps someone else. I purchased a pack of 10 TK moonclips for the GP 100 10mm Match Champion and found the fit was too loose with just about any brass except for Win headstamp. Federal was also loose but would remain in moonclip from holder on belt to cylinder during reload . R-P and Starline brass would not stay in moonclip during reload as I would have at least one cartridge fall out. With Win brass the TK moonclips work great and this combination is my choice for matches . I am using Ruger moonclips to shoot the non-Win headstamp ammo I have already loaded for my 646. That's strange. Both TK & Ruger brand 10mm moonclips are the same thickness - .032. Link to comment Share on other sites More sharing options...
eggman Posted September 18, 2018 Share Posted September 18, 2018 I failed to mention in my post about my moonclip experience with my GP-100 has been with 40 S&W . Although I have 300 pieces of new Starline 10mm Auto brass all my shooting has been with 40 S&W reloads. With my S&W 610 I can use the same moonclips with 40 S&W and 10mm with no problems however with the Ruger GP-100 moonclips there is a headspace problem using .032" moonclips (and I have experienced light strikes using Federal primers with 40 S&W brass with .032" moonclips) . TK is making a moonclip .040" just for 40 S&W that will hopefully take care of my light strikes . I have ordered some to try and if they work I might just be able to go with a lighter hammer spring. I had high hopes of using this pistol in IDPA for something different as I usually shoot speedloader fed S&W revolvers but the light strikes have been problematic. Link to comment Share on other sites More sharing options...
perttime Posted September 19, 2018 Share Posted September 19, 2018 10 hours ago, eggman said: ... TK is making a moonclip .040" just for 40 S&W that will hopefully take care of my light strikes . I have ordered some to try and if they work I might just be able to go with a lighter hammer spring.... Please let us know how it goes. Link to comment Share on other sites More sharing options...
eggman Posted September 20, 2018 Share Posted September 20, 2018 On 9/19/2018 at 1:58 AM, perttime said: Please let us know how it goes. My TK .040" 40 S&W moon clips arrived today and I was able to give them a try. First off I found that R-P headstamp brass fit loose but would not fall out when reloading but the Win brass still fit the best . The extra thickness of this moonclip seems to have solved my primer light strikes and was even able to go back to a 9 lb. hammer spring with no misfires . So, in all these moonclips were everything I had hoped for and plan to be shooting the 10mm gp-100 in my next IDPA match just for something different. Link to comment Share on other sites More sharing options...
perttime Posted September 21, 2018 Share Posted September 21, 2018 Good to hear. Works well with the correct moonclips. Link to comment Share on other sites More sharing options...
78Staff Posted November 8, 2019 Share Posted November 8, 2019 (edited) Super old post I know, but wanted to add... Denny at RIMZ is sending me a 646 (.40) moonclip to test - the 610 for the S&W version will not work with the Ruger GP100 Match Champion. Once I get it I'll post up results. RIMZ are the polymer moonclips and are so easy to load/unload, etc - I use them with my S&W 625 with great success for range use. For any carry use I would likely stick to tradition metal clips though. Anyway I'll report back how the Rimz 646's work in a few days. I pretty much only use starline brass but I do have some Sig 10mm I can test as well. https://www.ezmoonclip.com/RIMZ 646 moon clips.htm Edited November 8, 2019 by 78Staff Link to comment Share on other sites More sharing options...
SteelCityShooter Posted November 12, 2019 Share Posted November 12, 2019 I expect the problems with .40 S&W are that it relies on the moon clip for headspacing while the 10 mm headspaces on the cartridge case mouth. So the 10 mm can tolerate a loose fit in the moonclip while a sloppy fit .40 S&W causes mis-fires. Link to comment Share on other sites More sharing options...
78Staff Posted November 15, 2019 Share Posted November 15, 2019 Did some testing today, had no issues with the 646. However it is a bit thicker overall so rubs on the frame a bit due to the two level design - the main thickness dimension is thicker to support the relief cut for the rim of the brass. Haven't decided whether to order more or just get some more Ruger moonclips, which seem to work pretty good. Link to comment Share on other sites More sharing options...
SDGlock23 Posted December 14, 2019 Share Posted December 14, 2019 I have some TK Custom .050" moonclips for my Gp100 MC, I only really shoot .40 anyways but they work great. Factory moonclips gave me about a 50% failure rate. Link to comment Share on other sites More sharing options...
IHAVEGAS Posted February 7, 2020 Share Posted February 7, 2020 What is the final analysis on shooting 40 in the GP100 ? Would like to get back to fiddling about with local IDPA matches and have lots of 40 stuff already. Are the moon clip issues resolved well enough to not worry about light strikes and difficulty reloading the gun during a match? Link to comment Share on other sites More sharing options...
eggman Posted February 21, 2020 Share Posted February 21, 2020 On 2/7/2020 at 8:45 AM, IHAVEGAS said: What is the final analysis on shooting 40 in the GP100 ? Would like to get back to fiddling about with local IDPA matches and have lots of 40 stuff already. Are the moon clip issues resolved well enough to not worry about light strikes and difficulty reloading the gun during a match? I am so used to my Smith and Wesson revolvers I just couldn't get used to the Ruger and ended up selling my GP100- Match Champion in 10mm . However the last match I shot with it I used 40 S&W reloads with Federal primers and it worked flawlessly with the TK moonclips for 40 S&W . Changing the springs and using Federal primers it would be easy to get to a 6 1/2 to 7 lb. DA trigger pull weight with no light strikes . Also, Bowen makes an extended firing pin that would also aid in the endeavor to a light DA pull weight with no light strikes. Link to comment Share on other sites More sharing options...
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