More than any thing, I find throttle and angle control PRE-dive is more important than in the dive. If you setup right you should be hitting your maximum speed as you zoom past the target and begin your climb out. If you're compressing while diving in you're diving too early or too steep, both of which will make it extremely easy to avoid the shot, especially if the other pilot is at all aware of his speed and the rate you're closing at.
Try doing a High Yoyo with no throttle to enter into your dive with and wing over at the apex, then add throttle as needed to accelerate through your target. Another trick is to kick out your maneuvering flaps (1 notch of flaps) prior to entering the dive, this will slow your acceleration for a bit and help.
Finally, like everyone else said, throttle back, trim up and full rudder if you need it, it'll pull out pretty quickly. In the L model you can do a Shift-C for dive brakes, but I don't like those very much and don't think they work that well personally.
