I'm thinking like RT2506. Try once fired brass and bumping it might be a good idea. Or even some different brass like Nosler 7 STW. They sell Nosler brass at Sportsmans Warehouse. Could call, see if they have any and pick it up if your in the Portland area.
Also, what is the rifle's weight? Could it be jumping on the bags at all? Is a strap on cheek rest being used? If so it might not have a consistent slide on the rear bag. That can cause vertical flyers.
Good luck. I got a tag for the Steens a few years ago. What unit did you draw?
Also, what is the rifle's weight? Could it be jumping on the bags at all? Is a strap on cheek rest being used? If so it might not have a consistent slide on the rear bag. That can cause vertical flyers.
Good luck. I got a tag for the Steens a few years ago. What unit did you draw?