I placed my order for 5 moon clips. I have never used them before and after receiving them for 38/357 found them difficult to load the moon clips with my BMT loader. I called TK and spoke with a gentleman about my issue, and he recommended I choose the moon clips for Hornady brass. I'm now waiting on those to arrive. Also, I discovered the moon clips I 1st ordered worked great with Winchester, Federal, Buffalo Bore and Armscor. I didn't realize there are differences in some of the brass casings. TK is setting me up with the correct moon clips and I'm very satisfied!