It is not that uncommon for VLD bullets to shoot better at longer ranges than a short 100yds. Depends on the bullet/barrel combo, not a hard rule. Something about the long bullets needing some time/distance to "go to sleep". I've seen it working up loads for my Palma and LR Prone rifles. I have easiest access to a 200yd range and do most of my load workup there and then verify at 600 or 800. There have been several times where the statistical results at 600+ were quite a bit better than what the 200yd groups would have predicted for a given load shot at both distances on same range on same day.
