I have shot over 20 feral hogs with 5.56 AR 15 ... they drop in their tracks. I shoot them in the head - they go straight down. I have also shot pigs in the head with 9mm, 6.8 SPC, 300BLK, 308, 6.5 Grendel ... all of them go straight down. If there truly is a speed difference its is quite...