I assisted Tom Givens with a Rangemaster Instructor Development Course this weekend in Texas. We were are Karl Rehn's range near Giddings, which I am told is the North Central Plains geographic region.
The sandy dirt on the range choked numerous Sig 320 mags to death. One Magpul G mag briefly succumbed. The only OEM Glock mag to have trouble was a pre-2004 stamped “LE” mag. I don’t think this really says much about a carry pistol as you won’t be repeatedly dropping your mags in the sand while walking about, but those Sig mags just kept failing while the others ran.
The sandy dirt on the range choked numerous Sig 320 mags to death. One Magpul G mag briefly succumbed. The only OEM Glock mag to have trouble was a pre-2004 stamped “LE” mag. I don’t think this really says much about a carry pistol as you won’t be repeatedly dropping your mags in the sand while walking about, but those Sig mags just kept failing while the others ran.