savage .22 64 can not shoot straight

[paulxiaoliu]

I just bought my first rifle Savage .22 model 64 FXP semi-auto. I took it to 25 yard shooting range to zero in the iron sights and scope. When using the iron sights, the grouping was 3 inches to the right of the bulls eye. When I tried to zero in the scope(Simmons 3-9X 32), it was the same, about 3 inches to the right. I have to use tons of windage adjustment to zero it in (20 clicks at least). I did not bore sight before zero in the scope though.

Is there anything wrong with the rifle itself (Since both the iron sights and the scope were off)? Or it might be the iron sights?
How can I zero in the iron sights on this rifle? The front sight is fixed, and I can only adjust the height of the rear sight (rear sight can not move left or right).

Thank you