At 600 yards (600 even according to the RX1200 TBR) into a dirt/gravel hillside average diameter doubled to about .57" (all between .54 and .61) and retained weight was between 125-130 for 3 of the bullets and 143.7 for one. Bit of a windy afternoon at 84xx feet but was good practice. Did see a deer at 615 I took a look at, far enough to know I don't want to shoot at one that far with a 6x scope.