I'll take that challenge & film once I get my .257 or 6mm Scandalous or Pac-Nor barreled .257 Texan w/ full custom stripper/shroud. That'll have a BC between .193 & .212 for 65RBT to 95 grain
Already hit Coke cans at 300 with 31.9 RBT .25's @ 940fps and BC of 0.0763
That's 7.7 mils on 4x and almost 206.70" of drop.