[SHOT 2026] UDC M-PACT Metal Injection Molded (MIM) Cartridge Cases

Most of you probably know that the cup and draw stamping is the primary method of manufacturing cartridge cases. Some may also know about lesser-used technologies like machining the basic case and then final die forming. But did you know that it is also possible to make cartridge cases with the Metal Injection Molding technology? United Defense Corp.’s M-PACT (Molded Performance Alloy Case Technology) cases are MIM-produced, which, according to the company, provides superior structural strength to withstand extreme pressures and allows for tighter tolerances and improved consistency.

With the introduction of cartridges with higher-than-usual 80,000 psi maximum average chamber pressures (277 SIG Fury a.k.a. 6.8x51, 7mm Backcountry), this technology may become a more cost-effective way of producing high-pressure cartridge cases compared to multi-component hybrid cases or the use of super alloys. That is, if it performs as advertised. Additionally, the company notes that MIM case construction allows for lighter-weight cartridge cases at standard pressures, 20–30% lighter than traditional brass cartridges.

“M-PACT™ is not an incremental improvement—it’s a structural reset in cartridge design,” said Matthew Herring, President and CEO of Ultra Defense Corp. “By moving beyond the constraints of a centuries-old manufacturing process, we’ve reduced weight while improving consistency, durability, and reliability. The result is ammunition optimized for modern high-pressure weapon systems and adaptable to mission-specific requirements, from military and law enforcement use to sporting and hunting applications.”