So, ill try and make this quick. I have been hunting for three years and more or less get something every year. They arent all trophys, but they satisfy me. i do not need help finding the big deer. What I need help with is shooting. I usually make my shots without much problem, out to 200 yards. But although I make these shots they are not where I want them, often high, low, back or front of where I aim. I shoot a 7mm-08 for deer and a .300 mag for anything bigger. I want to be comfortable shooting out to 400 yards and out to 200 yards for running shots. I know many people will tell me "practice makes perfect" and i absoultly beleive this works, but there has to be a method, or tips, a website, maybe a BOOK? anything would help as I want to practice this off season extensivly and go into next hunting season with a very lethal and confident shot.

Thanks for any help.