Reply To: After about 100 shots the POI is shifting…

Forums PCP Airguns After about 100 shots the POI is shifting… Reply To: After about 100 shots the POI is shifting…

Link

17bullet
Participant
Member

“rcmark”Interesting shoot today.

Shooting at 105 yards, the first 3 mags shot well.
Filled the gun it started shooting 3″ to the right.
Did 4 more shots and it was a good group but  3″ to the right of the POA.
On the 6th shot POI started moving to the left.
By the 10th shot it was dead on again (POI = POA).

 


Well with your new information it sure sounds like a expansion problem with the air tube and its effect on the scope mount even more. 

What is the pressure change from the first shot at fill to the tenth shot when it returned to POI? It would be very nice to connect an indicator between the scope mount and air tube.

I could lend you an indicator that would be needed to be clamp on the scope mount. You would most likely need to move/take off scope.  USPS small flat rate box to get and ship back. You would need to have some mechanic experience. 

Scope Mount might want to be loosened and re-tightened to make sure the pressure is equal on the air tube between the contacts on them.