RE: gun sighting in
The 25 yard zero can work out pretty good if your scope isn't on high mounts. If so, however, you couldwind upbeing 6" high at 100 yards - which doesn't sound real bad until you look atwhere you are hitting at around 250 yards. My "one size fits all" zero is 3" high at 100 yards. For everything from a .50 muzzle loader to a .30-378 Weatherby, it seems to represent best practical field zero for the trajectory/maximum effective rangeof the big game rifle. Varmint hunting is, of course, a whole different ball game.