By far the best way to shoot a rabbit is to use swing through. Start with your leading foot facing your kill point and the gun/hold point about 5yds in front the trap just slightly under the path of the rabbit. Look back at the trap and call "PULL" and let the rabbit overtake the muzzles, then you/the gun must overtake (swing through) the rabbits feet but don't measure the lead, your instincts will do a much better job of that than you will believe me. Swing smooothly (3 x Os) and just pull the trigger instinctively when you have come off the front of the target, but keep the gun moving during and after you shoot, known as following through.
The 60% rise in your shot pattern will kill the target stone dead if you swing through the under-edge of the target.
But as always, never ever take your eyes off the target. Focus real hard on it the whole time. You can tell if your focussing hard properly because you will see the black clay shine silver at one point or another, that's the best time to shoot it.