I'm not where I can play with the numbers (at work)
Maybe do some math and calculate the following to see if they give you any ideas.
How much he drops from pre-shot to nadir
Drop / time, either as hours or minutes for rate of drop
Time to nadir
How fast he rises from below 150 to over 300, post-nadir
You may group some of these by ranges of where he started at shot time
Ex for > 300, 200-300, etc
To see if some of these differ by how high he was when he started.
Trying to think of what may be helpful in figuring out dose.