Nice shooting. If you feel like a drive, why not come down and we can stretch it's legs.
Angle of shot can really affect your drop table as can bore vs scope alignment and click values.
Having a drop table not agree with real world shooting is more common then not. BUT do run it over a chrony to see what speed you are getting. Also, BC's from many bullet manf's are off - some higher, some lower- so don't take a ballistic program as gospel.
It will get you close enough that you can see your impacts and adjust. Since the area looks hilly, consider that updrafts, head and tail winds can really change your drop chart. A few wind flags along the way can really help you see what the winds are doing.
Best thing is to test like you are and confirm a drop table that matches your load, rangefider and scope. As long as it stays consistent, repeatable and reliable, it's all good.
Nice looking rig and I am sure it rattles those gongs nicely.
Jerry