Roger, I have something for you to take a look at, please, and some questions.
I have plotted and rotated trajectories for 55 grains ammo against your elevations. They work like a charm, really. I used a 100 yard zero, which is a , very, very reasonable zero to consider at those distances, especially since the shooter (or patsy) was using a red-dot and his range’s website mentions targets at 50-100-187 yards for zeroing.
a) How sure are we about those ground elevations?
b) Did you consider a 1" high wooden block as a base for the bleachers?
c) Could you tell us more about your elevations? Can you explain the AGRdifference on your drawing, please? The differences you mention on your drawing, for trump and rail. I imagine you have a file somewhat like this one I’m sending everyone.
On these images and file, I’ve added another cells there in yellow which I called “extra”, so I could add or subtract more heights to test out my own different scenarios. One scenario I tested, was to use the data from the drawing, and then add the same values that you mention as AGRdifferences, (again, for a second time, as I understand now that those values were already considered in your ground elevations derived from those differences from the agr ground level) and when that is done, I get that the Crooks trajectory works. Have you tried such a scenario?
Oh yeah, and here’s the file
With the Extra values enabled, the Crooks trajectory works, and Vent doesn’t.
With the Extra values disabled, the Vent trajectories work, and Crooks doesn’t.