I also am very fond of moon clip enabled revolvers
Watch eBay and GB. Sometimes you can find parts there for lower prices
I just sold a spare 686 cylinder, that was cut for moon clips by TK custom,to a fellow Forum member for $175
It had been sitting in my project drawer too long and i figure that project was not going to happen
Now for some advice. . . .
You need to try a 357 moon clipped revolver before you do this.
Moon clips designed for auto loading cartridges are nice and thick. The clip engages the LARGE extractor groove. That groove is
defined in SAAMI and CIP standards and is virtually the same brand to brand
Moon clips designed for rimmed handgun cartridges are much thinner. The clip engages the tiny groove above the rim. That groove is
NOT defined in SAAMI or CIP standards and is totally different from brand to brand. This is why some moon clip manufacturers offer a variety of thicknesses. Some brass does not have any groove and will not work with a moon clip .
You have learned how nice and positive it is to reload your revolver with the 10MM Auto ammunition moon clipped.
357 magnum ammunition wobbles and the moon clip flexes because it is so thin (when compared to a 310/610 moon clip). It takes much more skill for a rapid reload. Many folks do not like it. . . . . .
All of that being said, I even like moon clips in 357 revolvers. Especially in revolvers used for personal protection. Not fo the speed of a reload, but for the positive ejection of all cartridges when using a short ejector rod snubby. My reload is usually a speed strip