I have 47D's, ETM's, and HD +P's in .45 ACP, and none have ever let me down; they are all 8-rounders. The HD +P's take a bit more to break in and load initially, but have a lifetime warranty on them. As far as 9mm mag's, I have the ETM's and they have all been flawless. I have not yet tried the Vickers mags, but I have metal bases on most of my 47d's and all my HD +P's, and the ETM's are all plastic base pads. I have not had any reason to try the Vickers mags or the CMC mags in either caliber. I also have the Wilson mags in .38 Super and 10 mm that have never failed me, so I have no reason to look elsewhere for those either. All the Kimber mags I have for my Kimbers work well also in all my different 1911's, which IIRC are Metalform and Checkkmate. I think in the end, your gun will tell you if it does not like a particular make/configuration.