There have been a good number of railgun development programs. The most advanced was run by the US Navy, over @15 years. But they abandoned the project in 2021-22. Too expensive for too little utility. They figured hypersonic projectile tech and missiles were more likely to pay off.
Look up “Naval Surface Warfare Dahlgren Railgun”.
“Look up “Naval Surface Warfare Dahlgren Railgun”.
Thank you. I was just so curious!