i just bought myself a Springfield xd sub compact in 9mm. After much thought and talk on here and going to the range and renting diff sub compact guns i decided on the XD and love it. However the 13 round mag that came with it will only accept 12 rounds. i tried two different brand of ammo and even tried the mag loader to see if it was just stiff but no matter what i could get more then 12 rounds in the mag. i bout a second 12 round mag (factory) when i bout the gun and that one will accept 13 no prob, and the 16 round mag that came w/ the gun will accept 16 no prob. i opened up the mag and everything looks norm and i cant see anything that is different then the other 13 round mag.

Has anyone else had this happen or have any ideas?