Boeing-Nammo Ramjet 155 sets new distance as companies plan to add guidance system
Future tests of Nammo-Boeing's Ramjet 155 munition will integrate a precision guidance system. (Photo: Boeing)
The results of the latest test were announced on 9 October and follow a previous record which was set in May last year.
According to the companies, the firing is a record for longest indirect fire test of a ramjet-powered artillery projectile. The distance covered was undisclosed but a company official said it was more than a third longer than than the previous firing.
It took place alongside officials from the US Army and involved firing a Ramjet 155 munition from a 58-caliber Extended Range Cannon Artillery at Yuma Proving Ground, Arizona. The test advances development efforts for the army’s top modernisation priority, Long Range Precision Fires.
The success follows last year’s Boeing-Nammo test recording the longest-ever indirect fire test of a Ramjet 155 munition. That test was completed using a 39-caliber towed artillery cannon at the Andøya Test Center in Norway.
Related Articles
US Army awaits long-range cannon study
Eurosatory 2022: Nammo looks to extend artillery range with smarter 155mm rounds
In an upcoming test, Boeing and Nammo will integrate a precision guidance system, leveraging a Joint Direct Attack Munition mission computer onto the Ramjet 155
This demonstration will evaluate the system’s maturity and effectiveness against stationary and moving targets, and readiness to transition into the next phase of development.
Nammo CEO Morten Brandtzæg said: ‘We believe the major development hurdles have now been cleared and production is viable within a relatively short timeframe.’
More from Land Warfare
-
![Eurosatory 2026 roundup: uncrewed, counter-uncrewed and new vehicles define direction]()
Eurosatory 2026 roundup: uncrewed, counter-uncrewed and new vehicles define direction
Uncrewed and counter-uncrewed systems were a major feature of this edition of Eurosatory 2026 along with programme updates and first sight of new main battle tanks.
-
![Eurosatory 2026: As MGCS stalls, has Europe’s new MBT been unveiled?]()
Eurosatory 2026: As MGCS stalls, has Europe’s new MBT been unveiled?
Eurosatory 2026 saw a number of main battle tanks on display, including two new platforms which could be the future of European tanks.
-
![Eurosatory 2026: MARSS and parent company EOS expand air defence capability]()
Eurosatory 2026: MARSS and parent company EOS expand air defence capability
MARSS became part of EOS Defence earlier this year, bringing together the former’s C2 NiDAR and Nation Shield air defence products with the latter’s suite of effectors and sensors.
-
![Eurosatory 2026: Pearson Engineering to send AI mine detecting systems into Ukraine]()
Eurosatory 2026: Pearson Engineering to send AI mine detecting systems into Ukraine
Pearson Engineering’s Threat-Sense system is designed to use imaging from drones to geolocate scattered mines and support uncrewed systems in defeating the threats.
-
![Eurosatory 2026: Milrem expands partnerships as it outlines NATO eastern flank defence plans]()
Eurosatory 2026: Milrem expands partnerships as it outlines NATO eastern flank defence plans
In the past three months Milrem Robotics has signed cooperation agreements with Hanwha, EOS Defence Systems and Polska Grupa Zbrojeniowa (PGZ) and at Eurosatory 2026 with CNIM Systèmes Industriels and Frankenburg Technologies. The deals come as the company develops its Eastern Flank Deterrence Initiative.
