Ogive:
Bullet ogive is the curve of a bullet’s forward section and can be expressed as a tangent ogive or secant ogive.
Tangent Ogive:
A bullet with a tangent ogive is one that has the cylindrical surface of the bullet tangent to the curve of the point.
Secant Ogive:
A bullet with a secant ogive is one that has the cylindrical surface of the bullet secant to the curve of the head. Bullets with a secant ogive usually have a very obvious transition from the bearing surface to the ogive length.