Development
The development of very-low-drag bullets has focused on the following main factors:
- the production of bullets with concentric and coincident centres of pressure and centres of mass
- bullet nose design incorporating a secant ogive, tangent ogive, Von Kármán ogive or Sears-Haack profile
- the use of carefully tapered bullet heels, or boat-tails
- a cavity or hollow in the bullet nose (hollow point) to shift the projectile's centre of gravity rearwards
- To reduce damage to the employed barrel and increase muzzle velocity, many modern mono-metal very-low-drag bullets are bore-riding bullets, in which thin driving bands are the only parts that are etched by the barrel's lands. The use of driving bands originates from artillery shells and to use these driving bands correctly requires projectiles and barrels to be precision-fitted to each other.
The resulting projectile should be very "slippery" (well streamlined) for easier passage through the air. Consistency in bullet production, allied to consistency in the assembly of cartridges (quality control) should give excellent shot-to-shot consistency.
The principles of bullet design and flight are classically set out in F.W. Mann's The Bullet's Flight From Powder to Target: Ballistics of Small Arms.
Read more about this topic: Very-low-drag Bullet
Famous quotes containing the word development:
“The experience of a sense of guilt for wrong-doing is necessary for the development of self-control. The guilt feelings will later serve as a warning signal which the child can produce himself when an impulse to repeat the naughty act comes over him. When the child can produce his on warning signals, independent of the actual presence of the adult, he is on the way to developing a conscience.”
—Selma H. Fraiberg (20th century)
“Somehow we have been taught to believe that the experiences of girls and women are not important in the study and understanding of human behavior. If we know men, then we know all of humankind. These prevalent cultural attitudes totally deny the uniqueness of the female experience, limiting the development of girls and women and depriving a needy world of the gifts, talents, and resources our daughters have to offer.”
—Jeanne Elium (20th century)
“I hope I may claim in the present work to have made it probable that the laws of arithmetic are analytic judgments and consequently a priori. Arithmetic thus becomes simply a development of logic, and every proposition of arithmetic a law of logic, albeit a derivative one. To apply arithmetic in the physical sciences is to bring logic to bear on observed facts; calculation becomes deduction.”
—Gottlob Frege (1848–1925)