Originally Posted by kiwi3006
Eric, any idea what might have caused this entrance wound?
I shot a pig in WV that had a similar entrance hole. It would be easier for me to explain if I had a sketch pad but I'll do my best. My pig was quartering with its nose down the hill. If anyone is familiar with WV you know that to call it "hilly" is the same as saying Minnesota has a few lakes. Even though I was only about 75 yards away I was on the downhill face of another hill.
As I cracked the shot the pig turned just slightly more downhill but the bullet found the side of the pig just behind the right shoulder. If you were looking at the face of a clock and my bullet was coming from 6 o'clock, the pigs nose was at 4:30 on impact. The steep angle of this entrance produced a nearly identical entrance hole.
As you might imagine the shot traveled a bit south of the boiler room but ended up causing so much damage to the lower part of the right lung through the diaphragm
and into the intestines that the pig was not going anywhere. A quick second shot into the broadside was not needed to kill the animal as a later autopsy would clearly show but I was concerned that the first shot was not well placed in the vitals so a second shot was the right thing to do.
Given the amount of damage our bullets do when they fragment, had the entrance hole you show in your picture been from our bullet fragmenting on the surface you would see two things. The first is that the hole would be about 4 times larger than it is in the picture. The second thing is that the hole would be ragged as the fragments would go in random and unpredictable directions (like a grenade).
Your angle may not have been as steep as the angle of the shot on the pig I described above but flesh reacts in some unpredictable ways at times. Think about the boxer who takes several blows to the face but suddenly one blow has the effect of opening a gash that if you are a fighting fan (more MMA than boxing for me) you've seen them be quite long and deep. Why did the skin open up like that on that particular blow when several other blows did not have the same effect? It is difficult to say conclusively but it happens. In this case I'd say it is shot angle combined with the somewhat unpredictable behavior of tissue.