Thread: Berger VLD groups with different jumps

Interesting results today with the 168gr VLDs in the .280 Imp. All the rounds were the same except for the seating depth, 5-shot groups at 110m; jump was 0.010", 0.040", 0.070", 0.100", 0.130" left to right. For scale the circles are 1 moa in diameter. Close to the lands wasn't good but it came right with the 40-thou jump - nice and tight with one flier that could easily have been me and if we exclude that then the seating depth is changing the groups from 2moa down to half moa. Groups may also be trending back down again beyond .130" - I might look at this next time.

So jump alone is changing the group size with the VLDs from poor to quite acceptable, and by as much as I've seen with any other variable. As a follow-on from my last thread on this topic it looks like this may be the primary variable to nail down with these bullets - before powder type or charge weight.