Increased caster level question

[JuliusCromwell]

I am building a magic missle mage and between Every thing I got I can increase my caster level by 6.

Now I understand this will not give me more missle.
How ever if I tack on a meta magic such as toppling spell who trip roll is equal to my caster level + casting mod, am I only allowed to add caster level equal to the max allowed my magic missle or can I use it for the check?

[bbangerter]

You add the full +6 to the trip attempt. Max number of missiles based on caster level is irrelevent to other rider effects based on caster level.

[vhok]

as long as your not at the max number of missiles yet then yes it would give you more. and yes it would increase toppling spell dc because your caster level is 6 higher than your level.