Not reliable - Mec-Gar USA Inc Magazine Ruger Mkiii 22/45 Model .22lr 10 Round Blued

I purchased this mag along with several Ruger factory 2245 mags and a 2245 Promag. The Ruger factory mags worked flawlessly and the Promag doesn't work at all. The Mec-Gar 2245 mag works ok with some brands of 22 ammo and not with others. I would not recommend this mag unless you are willing to fool with finding the right ammo to make this mag reliable.