[BroadHopper]

The only time my bird do that is when the outdrive tab is too high. I would lower the outdrive tab until the boat attitude is fine. Normally I use the trim tabs to level the boat. Or create a bigger wake for surfing. Both trims all the way down.
When taking off the outdrive tab is down to keep the bow down. When I hit speed, I normally raise the outdrive tab until there is an increase in rpm. Rarely do I trim to the point of porpoising. If I do I back down.
I only use the trim tabs to level the boat from Port to starboard. Sometimes if I have a lot of people and full tank, trim tabs all the way down can help you get out the hole.
Since you have the Bravo III I suspect you have a lot of torque (6 blades vs 3). I have driven Formula SS with Bravo III and never porpoise.
I have a Bravo II. I switched from 3 blades to 4 with much better overall performance. I urged anyone with a 3 blade to upgrade to 4.