All the bore sighting is intended to do is put you on paper. You still need to figure out what projectile and powder charge will shoot best from your rifle. In fact it would be hard to guess what kind of group your rifles would hold, and at what distance. Many of them have out of the box accuracy. What kind of rifles are we talking about? That might help get some information about the kind of projectile and powder charge that could be the best starting point. The rest is up to you and your father to get out there and do the range time to really tune these rifles. We owe the animals we hunt that much at least. If season is soon, you really need to get moving or perhaps plan for next years hunt instead.