What is more likely to go off, the scope or the gun? When I went to sight in this year, I wasn't even on the paper at 100 yards. I had to move in to 20 yards to get the bullet on the paper. It was about 1.5ft high and left at 20 yards. I thought it was a fluke. I zeroed it and began to hunt with it. Well, I ended up gutshooting a doe last week and never found it. No blood at all and no gut matter other than where she was shot. I took my gun to the sighting in area and it was 7 inches to the right at 50 yards (the doe was walking broadside from right to left).

The gun: Remington Model 700 .243
The scope: Simmons 3-9 from walmart.

BTW, the gun was sighted in at 80 yards last year.

Do scopes fail that dramatically, even cheap ones? Should I be worried about my gun?