No, they retain about the same percentage. Or at least they do in "media." I've never recovered a 200 from an animal, but have recovered several 180's. Did have one 200 stay in an elk, but it was a lengthwise shot and never found it, though from the wound channel knew it penetrated at least 4 feet.
Once put a 200 into the big shoulder joint of a 6-point bull standing quartering to me 75 yards away. It broke the shoulder, went through the chest cavity, and exited at the rear of the ribcage on the far side.
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.” John Steinbeck
