More than six decades after the M109 entered service and following a series of...
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![The ERCA autoloader being tested at Yuma Proving Ground in June 2019. Although the US Army conducted a number of successful tests with ERCA prototypes, engineering issues, such as excessive wear on the 58-calibre gun tube after firing a relatively small number of rounds, led to the ERCA prototyping effort’s discontinuation in April 2024. [US Army]](https://euro-sd.com/wp-content/uploads/2025/10/1_ERCA-US-Army-Kopie-324x160.jpg "The US Army’s search for new self-propelled artillery: A long haul for long guns")