4DOF inclined fire error

[Bevan]

I get wildly different results for inclined fire with 4DOF vs Applied Ballistics Quantum & other calcs.

The 4DOF app provides a solution with much greater difference between flat and angled fire than all other calculators.

Using inputs of
MV 2747
Bullet: Hornady .22 80gr ELDM (using drag model in 4DOF, and g7 bc of .244 in other apps)
1:8 twist
Sight height 42mm
Zero range 100M
target range 600m
Standard atmosphere at 0m ASL
wind 1m/s from 270 deg
target at 600m, flat or -20 deg angle.
elevation correction in mils
azimuth 114 latitude -043

See this table for the results from 4 different solvers:

Any clever ideas? Has anyone else found this with 4DOF? Real-world results for flat shooting are great for me with 4DOF. However, I've been using AB because the real-world results for angled shots seem to match up better.

 

[JustSendit]

I get wildly different results for inclined fire with 4DOF vs Applied Ballistics Quantum & other calcs.

The 4DOF app provides a solution with much greater difference between flat and angled fire than all other calculators.

Using inputs of
MV 2747
Bullet: Hornady .22 80gr ELDM (using drag model in 4DOF, and g7 bc of .244 in other apps)
1:8 twist
Sight height 42mm
Zero range 100M
target range 600m
Standard atmosphere at 0m ASL
wind 1m/s from 270 deg
target at 600m, flat or -20 deg angle.
elevation correction in mils
azimuth 114 latitude -043

See this table for the results from 4 different solvers:
View attachment 8782333

Any clever ideas? Has anyone else found this with 4DOF? Real-world results for flat shooting are great for me with 4DOF. However, I've been using AB because the real-world results for angled shots seem to match up better.

So i admittedly used 4dof much less than AB. I did see a difference shooting angles as big as 30 degrees. Personally, AB lined out more accurately for me.