i just recently got to go shoot my fn for the first time the other day and i had something happen to me and i wondered if any one else has had it happen to them or is it something that rarely hapens? i was shooting the white box ammo and i had about one in five rounds jam up in the gun and about a third of the rounds never fire at all. in trying to pin point the problem i switched mag to the blue tip and never had a jam or a miss fire. Did i get a bad box is that the nature of the round?