Revolver Supply S&W 627 moon clips in a Super GP100? in Revolver Forum Posted August 2, 2020 · Edited August 2, 2020 by IHAVEGAS too many zeros 21 minutes ago, 10mmdave said: How "tight" are the rounds in the moon clips you folks are using ? Winchester in the revolver supply clips that I measure at 0.044 is too tight for me to be able to use a BMT sooner/demooner, or at least to want to. The brass does turn freely after loading. Same brass with the 0.035 feels right to me, but maybe the real revolver gurus would want tighter. Got this in an email from David Olhasso, referring to the 9mm Super GP 100: I personally prefer TK .040 moons. I use RP brass and special TK moons cut to hold the RP brass properly. If I wasn't using RP brass, I would be using Winchester. The issue is, depending on your Crane length and b/c gap, you may not be able to use .040 without some modifications. I suggest getting.035 and .040 samples and determine which is best, or just resign yourself to using .040 and cut back the crane and barrel if necessary. -dave Would be interesting for me to try the TK Custom clips (likely would measure at 0.040 instead of 0.045).