How did you wait so long? 3D shoots is how I got into trad archery, and I'm only recently trying to get it together to start hunting. 3D shoots are so much fun, and even more fun when you go to the weekend long shoots and get to camp and shoot with great people.
Anyways, my local club does 28 targets for weekend shoots, but the summer league has only 14 targets set up.
For 14 targets, I'm happy to break 200, but regularly shoot in the high 100s.
We score on a 10-8-5 basis, two arrows each target. 10 for heart(really just a ring inside the lungs), 8 for lungs, and 5 for any part of the animal that isn't horns or hoofs.
I rarely miss the target completely, but some guys are really good and never miss the vitals. But, you have to consider that this is a game, and half of the shots are shots I probably wouldn't take when hunting. Either they are farther than my comfort zone, at an odd angle, behind/around trees, through brush/trees, etc. I also don't plan to hunt big mosquitoes or giant cobras...
I have found that anything within 20 yards is an easy 16 points for me(2 lung shots or better), so even if I don't shoot a really high score overall, I get to know what I'm comfortable with, and what my limits are.
If they have a league, or any form of regular shoots, I would suggest that you go as regularly as possible. I notice that if I shoot in the league, by the end of the summer, my score are much higher than when I start. It also helps to get the chance to take awkward shots that you might not otherwise practice in your backyard.