I'd sight in 1" low at 25 yards. Where it hits at 100 will depend on how high the centerline of the scope is above the bore and the actual performance of you rifle. Ammo manufacturers often state a muzzle velocity on the package, but in my experience it's rarely right (I've seen as much as +50/-150 fps) so ballistics charts aren't a very good way to sight in a rifle.

Sighting in 1" low at 25 is only a starting point, and if you want to zero at 100, you're going to need to find a 100 yard range. -1" @ 25 yards is only good to (almost always) get you on paper at 100. Also remember that any error in your zero at 25 is magnified 4 times at 100 yards. If you're off by 1/2" at 25, you'll be off by about 2" at 100. Your zero will be much more precise once you can actually shoot at 100.

Good luck,

Mike