RE: 3" groups @ 25 yds?
Shooting at a dot or a target is not the same thing as live game or 3-D targets. You don't have any thing to aim at persay and have to use the body structure as a guideline. Practicing this really helps when you get out in the field. You can also try different shots and angles to see how they would really work on game.
Sometimes what you think is a good shot really isn't when you study it. And I found out the hard way a 3-D target is harder to hit than a spot target if you have never tried it before. Especially at longer distances. They are a great learning tool if you can get one to play with. Some have the outline of the bones instead of scoring rings, those are the ones I like.
Paul