I think it has happened to all or most of us at some point.
Last week I test fired a factory load in my "FTW" 6.5 CM with the new timney trigger adjusted at 2lbs. 5 shots, each shot after the first went higher and wider to the right. The group measured about 2.5" wide and 3" high. I was about to give up on this rifle as a great shooter.
I than shot a 5 shot group in a 77 mark 2, 7mm rm. With bullets loaded for Elk. It has a new reduced trigger spring, now at 4 lbs from 6lbs. That group was 1/2" wide 1 3/4" high.
Still mad at home an hour later I pulled out the rifles to clean them. The scope on the FTW had slid in the bases. I checked the screws, I had not tighten them. They were just tight enough to hold it in place on the bench not being fired. There is a lesson here.
Last week I test fired a factory load in my "FTW" 6.5 CM with the new timney trigger adjusted at 2lbs. 5 shots, each shot after the first went higher and wider to the right. The group measured about 2.5" wide and 3" high. I was about to give up on this rifle as a great shooter.
I than shot a 5 shot group in a 77 mark 2, 7mm rm. With bullets loaded for Elk. It has a new reduced trigger spring, now at 4 lbs from 6lbs. That group was 1/2" wide 1 3/4" high.
Still mad at home an hour later I pulled out the rifles to clean them. The scope on the FTW had slid in the bases. I checked the screws, I had not tighten them. They were just tight enough to hold it in place on the bench not being fired. There is a lesson here.