What happened to my blood trails?

[EatBugs]

I shot two does so far this season and neither one of them left much of a blood trail. I had to rely on watching them drop. I shot a perfect double lung shot on a small doe in a corn field, ran only a few yards. I looked for a blood trail just because I can and found nothing where I shot her. I found some dribbles closer to the body though. Today I just shot a large doe. Angle shot from a stand. In the lung and out further back She angled away when I shouted at her before the shot. I tried placing the shot farther up her shoulder but to no avail. It still ended bad. But, she did die very quickly but not before doing a nose dive into a deep ravine. Did I mention I forgot to bring a tow rope? Anyway, No blood trail there either just some dribbles by the body. I did find a pee trail though. I'm using a 20 ga with Hornady sst's. Last year I used a 12 ga with cheep crap and that doe left a river. Is the lack of blood trail a result of different ga bullets, or different brand bullets, or something else?

 

[Double Naught Spy]

Do you have exit wounds?

 

[EatBugs]

Yep both had exit wounds. First doe shot at 40 yards, second doe shot at 15 yards. With a 20 ga shotgun.

 

[gezzer]

Were your shots high in the lungs? When they are the blood pools into the chest untill it reaches the exit hole. Most fall and die before this.

 

[EatBugs]

the first doe was shot right smack in the middle of the lungs. The second doe was shot from a tree stand so the bullet went in about the Forward middle part of the lungs and exited out the liver and unfortunatly nicked a bit of the gut (she kept angling her rump away the more she looked at me).
That might be it