Two weeks ago I tested a batch of hand loads in a 270, using 59.5gr of 4831sc and varying the jump. At 0.1, 0.3, and 0.4" groups were sub-moa, with 0.4 being the best (0.7 moa) Fast forward two weeks. I neck sized the brass from the last session and loaded about 20 to mimic that best group, with 0.4" jump. Those rounds loaded to jump 0.4 were well over an inch, at the next range visit.
I feel like the shooter and gun were proven with the first session. What direction would you go to figure this out?
Last edited by turkish; 10/20/14.
