Hi, all.

I'm having a weird issue with one magazine--one magazine only. I have 3 20-round magazines, labeled with blue marker to keep them straight. #1 has been used extensively, and I'm just starting to fiddle with 2 and 3. Today at the range, magazine #2 did something odd on 4 consecutive groups--the first shot went 3 inches high and right, and the rest (rounds, 2, 3, 4, etc.) were back on target. This happened 4 straight times, with 4 different types of ammo. Has anyone had this come up before? Any thoughts?

Thanks,
frayluisfan