Getting accurate ranging Daystate Revere, something weird here…

[P50one]

I’m fairly new to the discipline, although I have shot at several Gp events. So I have become intimately aware that good doping data is critical.
I’ve been practicing, and collecting data on my gun/pellet combo.
I’m currently gathering data for each yard between 10 and 30yds on my Daystate Revere, and have run into a strange phenomenon. The scope is zeroed at 23 yards, everything shorter is held over, everything longer is held over until I get to about 29 yards. I’m finding that I have to hold UNDER by a fraction of a mil dot.!?
after 30yds its back to over. What am I dealing with here? parallax error, pellet instability, shooter error?

 

[P50one]

Scope is an Athlon Midas TAC 4-16 x44, pellets are H&N Barracuda Match 10.65 .177

 

[Franklink]

Move your "zero" down a few clicks (maybe as little as only 1 or 2 clicks) and it should do away with the hold under right at the apex of the trajectory curve.

 

[davecole]

Sounds like your zero is just a tad short.
Move it out to 25 and see if that eliminates hold under.
As a reference, my BSA is shooting the same pellet @890 fps with a c-c bore/scope of 1.75”. That’s where Chairgun has my optimum zero (0.00”).

 

[P50one]

I appreciate the fast insight guys, thank you!
Ill try your suggestions this evening and see what happens.