ヨーロッパのレールガンは実験室環境だとマッハ10なんだって
日本のもそのくらいいくのかな？
EDR On-Line understood that laboratory tests at ISL allowed the projectile to reach Mach 10, which means nearly 3,500 m/s, the starting velocity considered “hyper” being Mach 5.

www.edrmagazine.eu/euronaval-2024-electromagnetic-railgun-technology-from-isl