I was raised on the paper plate theory, if you can place six arrows in a paper plate your good to go. And in regard to Shadow, what arrows and broadheads are you using? and are you tuning your arrows to the heads? Establishing proper nock and head alignment, along with shooting them out of a well tuned bow should result in grouping your broadheads with your field points to within an inch of each other everytime. I have learned this the hard way early on, but it has helped me greatly since I now take the time to do this. Just last weekend I shot a doe out to 70 yards, and I was 100% confident with that shot, for I was able to shoot it all summer. This was acheived by tuning my broadheads, which I think might be your problem. Send me some feedback, would be nice if it would help your range at all.
"Look what venison does to a goofy guitar player from Detroit? I'm going to be 54 this year and if I had any more energy I'd scare you."
- Ted Nugent