I shot my springfeild 1911 a1 mil spec tonight at my local indoor range. This is the first time this gun has been shot since I bought it new. I was shooting pci ammo . I did not have one malfunction of any kind I shot a whole box of ammo 50 rounds. Magazines used were stock mags, Wilson etm mags , and Tripp cobra mag. All of the mags performed well . But I like the Wilson's best they just seem to be smoother when loading with ammo.