My son is starting the 4-H shooting team in our county. We have mostly shot off bi-pods at home. Does any one have a training tip or help. He shoots standing, kneeling, setting, and prone. While some of the others have nicer stuff, we are going to use a Marlin glenfield and a Marlin 39a possibly. 6x scope is the max allowed. Looking at the others skill I think he can compete at 25yds with these rifles. Is there a book that may be of use to him as reading is his best method to learn. Thanks.