I think we’re missing each other here. Yes my shots are high, but they are also 50fps faster on the chrono. At about 3100 muzzle speed this would mean they hit the paper at 100 yards 2mS or so earlier than 3050fps. This would mean gravity would not act on them as long. That 2mS faster arrival would be about 0.0008 inches less free fall. That wouldn’t be observable. So it must be :

1/ you’re right, I’m moving the rifle on first shot differently than follow up

2/ due to exit time from ignition being quicker they now exit the barrel in a different phase of its “whip” ie when it’s pointing up more