Second time this has happened to me..... I was at the range today to test of seating a little deeper would increase accuracy, you know, read an article in a mag.... nope, groups opened up to 2+ inches with shots all over the place when I used an COAL of 2.7975 and 2.7960 rather than the 2.8 I have been using (.308 win, hornady SST 165gr, 43.8gr of varget) Not that I am unhappy with the accuracy I am getting really (savage Edge resting on my shooting bag)....

Anyway, I decided to shoot one last group with my standard 2.8" COAL just to make sure it asnt the gun acting up that opened up my groups, the first three rounds formed a perfect 3 leaf clover touching at .383" center to center, the 4th opened it up to 1.05", and the 5th to 1.995".... Shoulda quit while I was ahead... lol....

(edit - I just realised I put 2.975 and 2.960 rather than what it should have been 2.7975 and 2.796)