No, the deer my friend shot with 75gr Gold Dot had a nasty entrance wound, as well. He hit it at 142 yards, I hit my deer at 25 yards with RA556B. Judging by the pork, the GMX just opens slowly. he has said the same thing about the animals he has killed with GMX. Smaller entrances. Here is my RA556B on my deer, and 75gr Gold Dot on the deer he hit, in that order.
Entrance 64gr RA556B, 25 yards (paced off), 16" barrel.
Entrance 75gr Gold Dot, 142 yards (lasered), 16" barrel.
*Mine is shown after being skinned with some of the blood-shot meat removed, I believe his photo is just field-dressed, hence less "sunlight" through the hole, but they look pretty similar.