Killed an elk at 505 with the 140 Accubonds. Shot her twice and both exited with significant damage. Could have shot once but she was still standing. The first shot entered close to the last rib and angled forward and came out the front of the left shoulder. I thought that was impressive penetration. Was shooting a 18” Barret Fieldcraft with a DeadAir Sandman Ti suppressor. Seems my muzzle velocity was 2730 off the top of my head.