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ULD Tips, size 50, pkg/500
ULD Tips, size 50, pkg/500 Quantity in Basket: None
Catalog No.: TIP-50-5
Price: $130.00
Shipping Weight: 1.50 pounds
The precision turned metal tips for .338 to .510 caliber bullets in Corbin's hybrid ULD-TIP ogive shape provide higher BC than is otherwise possible with the same weight and caliber of bullet in the standard Ultra Low Drag shape. The tips are installed using a special PF-1-ST or PF-1-HT point form and tip seating die. The -ST type dies have two ejection punches. One forms a cavity for the stem of the tip insert. The other aligns the tip and presses it into the bullet exactly on the center axis. The ULD-TIP style bullet can be added to any die set by purchasing the PF-1-ST, or the PF-1-HT. The die, base punch, and two ejection punches are included under this designation or catalog number, so you do not have to order them separately. Any set of 3 or more dies can be expanded to make the ULD-TIP bullet in this manner.


TIP-50 (right) compared to TIP-30 (left)

(The tips are specific to the Corbin ULD ogive. They do not work with other ogive shapes, but do work with all calibers in specified range.) For detailed specifications, click TIP-50.PDF ( requires Adobe Acrobat reader, free from Adobe systems.)

  • Shank diameter: 0.11 in.
  • Base diameter: 0.260 in.
  • Cone length: 0.500 in.
  • Shank length: 0.312 in.

What is a hybrid ogive shape?

Hybrid ogives are a mixture of two or more different shapes, blended into a smooth continuous form to reduce drag and eliminate secondary shock waves from discontinuity in the ogive curvature.

Secant ogives are formed from a portion of a circle or arc of a given radius, the curve of which intersects the bullet shank at some angle other than 180-degrees or 0-degrees (depending on your preference for measuring it).

Tangent ogives are a special case of secant ogive in which the curve of the ogive arc joins the shank of the bullet at exactly zero (or 180) degrees.

Spire point ogives have no curve, but are composed of a conical shape (like a pencil point). As the radius is made larger and larger at some point both the secant and tangent ogive cannot be distinguished from a spire point. (Any curve with a large enough radius will for all practical purposes appear to be flat or straight.)

Tangent ogives are often called "spitzer" shapes, from the German term for "sharp". This is a very old terminology meant to differentiate the tangent shape from the round nose or eliptical ogive shape used in early rifle rounds. Very few military rounds use anything but a "sharp" ogive in modern times, but the term "spitzer" still refers to "tangent" curves.

Corbin's ULD (Ultra Low Drag) ogive is a blend of a long secant curve and a tangent curve, whereas the ULD-TIP ogive has been modified to include tangent, secant, and spire shapes, with seamless integration to maximize the ballistic coefficient with reasonable weight and ogive lengths. High BC can be achieved in other ways, such as large weight for the caliber, or extremely long ogive curves, but these methods can be self defeating by requiring impractical twist rates, or excess pressure and recoil. The ULD-TIP achieves the highest practical BC for a given caliber and weight. Base drag is reduced by using the rebated boattail instead of flat base (RBT trades a small amount of BC for greater precision, by greatly reducing muzzle-blast dispersion of the bullet due to the focusing effect of a conventional BT base, breaking up laminar muzzle gas flow around the bullet base and into a "ball of gas" in front of the bullet. Instead, the RBT and the flat base tend to deflect most of the muzzle gas in a ring, so there is less turbulence in front of the bullet as it exits from the bore. Also, the RBT provides a quicker release as compared to a conventional boattail, by dropping the diameter suddenly as the bullet emerges from the muzzle rather than more slowly increasing the gap between bullet and barrel as with the conventional boattail. The RBT is a sort of hybrid design for the base, blending the benefits of the flat base for accuracy with the benefits of the boattail for lower base drag.

Related Item(s)
Code Name Price Availability  
TIP-30-5 ULD Tips, size 30, pk/500 $120.00  

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