Kral Puncher Breaker Marine.25

[wzi2fst]

Having a issue with grouping after about 1000 rounds. the rifle stacke rounds 1" left, then groups 1" low right. Finishes off mag with dead zero center. using jsb 18.25 ammo. Have already verified bipod and scope not the issue. Anyone else having this problem. Pyramid air is sending a new cocking lever but i don't think this is the issue.
Any feedback appreciated.

 

[JimNM]

Check breach seal.

 

[Hynzie]

Try hand loading

 

[John "spysir" Blount]

Sounds a bit like shift from airtube & such stretching, barrel attachments all correctly tightened, loosened, such as that.
It repeats everytime across a fill?

On a standard rifle you might try floating the barrel but on that one it may not be an option ?

John

 

[wzi2fst]

I'll do that . Thank you.