This 350W setup seems to move out just fine.
350W (ARC 28-37-2, 1500mAh 25C battery): Now we're stepping it up. Not for beginners. Don't try this unless you've already flown with 300W or are a darn good pilot to begin with. Less thinking, more reacting (which means, in order to react without thinking you better already know what you're doing because there's not enough time to think!). This is when being skilled and confident enough to turn hard and fast helps to keep the plane closer. Otherwise, the Rifle can get away. At this power (and beyond), you still want a nice toss, but launches will be a non-event because the plane gains speed and altitude immediately.
Hereā€™s a nice video flying my Rifle with the 350W setup:
http://www.youtube.com/watch?v=gOxi61oxfnM