After almost a year, I finally have my Tac-Pac scope hitting bulls-eyes.
I had to get the first Marstar scope mount replaced because it didn't fit onto the rifle properly. Had to use a washer on the new mount though.
Then my gunsmith and I tried to get the gun zeroed. We kept trying to get the scope to align properly on the mount, but it looked and shot crooked.
At it's former best setting, it was shooting about an inch to the left of the bulls-eye with no more play in the crosshairs.
We were going to try and shim the scope rings, when my gunsmith said we should try turning the scope rings around.
The scope ring's attachment screws to the mount rail were facing left.
They are now facing to the right (same side as the cocking handle) and I'm hitting the bull as of Sunday.
I still have some play in the scope to the left and right as well. Now I'm ready for hunting season.
Hope this helps.