PP semi-short on button

[11t]

I've been evaluating my play lately and I can't figure out if this is a leak of mine or standard play. Lets say the blinds are going up in 1-5 minutes.

PokerStars No-Limit Hold'em Tourney, Big Blind is t100 (5 handed) converter

Hero (t1320)
SB (t3597)
BB (t4168)
UTG (t820)
MP (t3595)

Preflop: Hero is Button with 4[img]/images/graemlins/heart.gif[/img], 4[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises to t1320</font>

[lastchance]

13x BB? Could always raise standard 3x BB, but I think this is fine too.