I have a new Glock 19. I only have about 20 rounds through it so far. One of my mags is a little stubborn getting in. Its not hard to get in but it just requires a bump. In doing so though I have noticed marks starting to form on the top round, around the top of the shell where the bullet meets the shell. Is my mag too packed (14 rounds) because I am not carrying condition 1 with a full mag or is this normal?