Reticles, methods of use and manufacture

A method for selecting a zero point for a target acquisition device comprising a reticle, said method comprising:

• a) having a target acquisition device comprising a reticle, said reticle comprising:
• i) a first horizontal cross-hair intersecting a first vertical cross-hair;
• and
• ii) a plurality of unevenly spaced second horizontal cross-hairs intersecting said first vertical cross-hair below said first horizontal cross-hair;
• and
• b) using software to select a zero point from zero range markings on said first vertical cross-hair above said first horizontal cross-hair for a selected projectile caliber, wherein said software is configured to identify a first zero point for a first projectile and to identify a second zero point for a second projectile wherein said first projectile and said second projectile are different projectile calibers such that said plurality of unevenly spaced second horizontal cross-hairs provide accurate ballistic drop compensation lines for hitting a target at a plurality of distances represented by said second horizontal cross-hairs, wherein a plurality of aiming points on three or more said ballistics drop compensation lines are provided to hit said target within three inches of the expected impact point for said first projectile and said second projectile of different calibers by said software that identifies said zero point on said first vertical cross-hair for each of said different projectile calibers.