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 young women, what can they not learn, what can they not achieve, with Columbia University annex thrown open to them? In this great outlook for women’s broader intellectual development I see the great sunburst of the future.”
—M. E. W. Sherwood (1826–1903)
“Creativity seems to emerge from multiple experiences, coupled with a well-supported development of personal resources, including a sense of freedom to venture beyond the known.”
—Loris Malaguzzi (20th century)
“The man, or the boy, in his development is psychologically deterred from incorporating serving characteristics by an easily observable fact: there are already people around who are clearly meant to serve and they are girls and women. To perform the activities these people are doing is to risk being, and being thought of, and thinking of oneself, as a woman. This has been made a terrifying prospect and has been made to constitute a major threat to masculine identity.”
—Jean Baker Miller (20th century)