I bought a new P11 over the weekend and the only thing I'm not to sure about is the bullets in the magazine seem to rattle around. It's almost like the ammo is not held tight in the mag. Is this common or is it just mine?
Yep, expect rattles about half the time.
Not only on KTs, either: Berettas, Sigs, etc., all have rattling mags.
In 9mm, remember the case isn't straight-walled like a .45 ACP, but is tapered.. cone shaped, in other words. It's almost impossible to cure a rattling mag without modifying the mag to an extent I wouldn't trust it anymore.
I'd say just let 'er rattle away.
I have found one of two things that sometimes work; 1) sometimes you can tap the spine of the magazine and this will "seat" the rounds and sometimes will cure the rattle and 2) in come cases I have unloaded the magazine to the round that has shifted slightly forward, reseat the round and load the rest. Remember these only occasionally work and as Flyer noted, this is a common problem in many 9mm magazines. I have noticed that for some reason that it seems excessive in my P11 magazines more so than some of my others.
Don't the graphics attachment rules state that all guns and/or accessories must be photographed on a BBQ pit or a microwave? I suppose any cooking device would work, but a computer in the background seems all wrong.