Just curious! My 30 will hold the 10th round in the mag, but it seems to be almost an unnatural fit, meaning I really have to fight to squeeze the round in! And, with a round chambered, the gun will not accept a a full 10 round mag. Works fine with 9+1, but not 10+1! Anyone have this problem? And if this is common why does Glock advertise and promote 10+1 for the Glock30??