Copper-polymer bullets made by injection moulding

September 2, 2015

The firing of small arms ammunition for training, sport, law enforcement, and military purposes is a significant source of environmental pollution. The ammunition for small arms is normally made from high density metals such as lead and its alloys, which are traditionally shaped by casting or by cold forming where the metal is shaped in dies to create the projectile shape. Powder Metallurgy has also been used to produce non-sintered lead-free bullets where the frangible, or “soft”, rounds are designed to break apart when they hit walls or other hard surfaces to prevent ricochets during close-quarters combat.

Copper-polymer bullets made by injection moulding - bullets

INCPTR-Ammo6-CU1-5784 ammunition made by injection moulding of a copper-polymer compound by PolyCase Ammunition

Early in 2015 PolyCase Ammunition of Savanah, Georgia, USA, introduced a range of patent-pending lead-free projectiles using a copper alloy powder combined with a high-strength polymer binderwhich the company has designated Cu/PTM. The Cu/P projectiles are lighter and faster than lead, are environmentally safe and range compliant. They are produced by PolyCase using a fully automated injection-moulding process and loaded to SAAMI specifications in high quality brass cases.

PolyCase founder and CEO Paul Lemke stated that by using injection moulding of the copper-polymer mixture, the company has been able to produce bullets with a number of advantages. For example, the Cu/P bullets can weigh up to 30% less than lead bullets with similar profiles and being lead free they are more environmentally friendly. Lighter bullet weight also means higher velocity, less recoil and low ricochet – all important qualities for indoor or close range training.

The injection moulding process used by Polycase is said to have fewer weight variations compared with cast lead bullets and ensures excellent concentricity. The process also allows unique shapes to be produced which would not be possible with conventional processes.

www.polycaseammo.com

 

Powder Injection Moulding International magazine

In the latest issue of PIM International…

Download PDF

Extensive MIM, CIM industry and sinter-based AM industry news, plus the following exclusive deep-dive articles and reports:

  • Frank Petzoldt on the past, present and future of MIM
  • Saturation in metal Binder Jetting
  • Insights from the 2022 International Conference on Injection Molding of Metals, Ceramics and Carbides
  • Additive Manufacturing at CeramTec
  • The carbon footprint of injection moulding machines
  • Calculating the sintering shrinkage of MIM parts

The latest news from the MIM, CIM and sinter-based AM industries

Don't miss any new issue of PIM International, and stay up to date with the latest industry news. Sign up to our fortnightly newsletter.

Sign up

News from the industry…

    Discover our magazine archive…

    The free-to-access PIM International magazine archive offers unparalleled insight into the world of MIM, CIM and sinter-based AM from a commercial and technological perspective through:

    • Reports on visits to leading part manufacturers and industry suppliers
    • Articles on technology and application trends
    • Information on materials developments
    • Reviews of key technical presentations from the international conference circuit
    • International industry news

    All past issues are available to download as free PDFs or view in your browser.

     

    Browse the archive

     

    Looking for suppliers of materials, production equipment and finished MIM, CIM or sinter-based AM parts?

    Discover suppliers of these and more in our advertisers’ index and buyer’s guide, available in the back of PIM International.

    • Metal powders
    • MIM, CIM & AM parts producers
    • Binders & feedstocks
    • Feedstock mixers
    • Furnaces & furnace supplies
    • Atmospheres & gas generation
    • HIP systems & services
    • Injection moulding machines
    • AM technology
    • Debinding systems
    Download PDF
    Share via
    Copy link
    Powered by Social Snap