Changes in POI

[Rosebud]

Agree with further breaking period. My CA Ridgeline didn't settle down until about 80 rounds down the tube.

 

[ResearchinStuff]

Second group is quite a bit larger, indicating that might actually be more of a 2 moa 10 round rifle. If so, it could be as simple as your initial zero was off because of small sample size error off the 3 shot group, with the actual center of the cone in between those 2 groups. I'd shoot a couple 10 shot groups and see if there's actually something going on with the poi. The 10 round groups should be much more repeatable than the 3 shot groups.

 

[BillLarson]

I,ve done alot of testing....
make sure your shooting a dirty barrel..
A better stock would help...

 

[Doom2]

Assuming you are using the same setup of rest/bags I would say you might want to check your rear bag management.