Went back to the range with the load that shot well the first couple times out.
180gr Sierra ProHunter
H4831
First two groups were very disappointing and had me scratching my head, so I checked the action screws... Very loose! The front was pretty loose and the rear was loose enough to put my finger on it and turn it. I thought I checked these screws when I bought it but don't remember.
These are some of the first groups before tightening the action screws