I have a BMT mooner but for my 627 using rimmed cartridges. There is nothing to come unscrewed on their rimmed version. For all my revolver I use a golf club handled for most of my demooning as it lets me quickly and easily separate spent cases from live rounds on partially used moonclips. For mooning rimless cartridges I use a moonclip tool very similar to the TK Custom version from Mooncliptool.com, that appears to be out of business now. When I first started shooting USPSA Revolver division I use an old pair of channel lock pliers to moon and a modified 7/16" nut driver to demoon all my moonclips. When I went to the Revolver Nationals (2014) I had enough ammo on moonclips to shoot the match three times. I did not touch a moonclip tool that entire weekend.