There has been documented tests of railguns launching raw material around those speeds (<a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Railgun#Tests" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Railgun#Tests</a>). As the sibling comment said, there&#x27;s no reason to limit ourselves to 3g (yet), and indeed someone laid out a plan to launch material to space with a railgun, where the first &quot;stage&quot; would be a railgun and the second stage would be a traditional rocket (<a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Railgun#Launch_or_launch_assist_of_spacecraft" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Railgun#Launch_or_launch_assis...</a>). It says that acceleration can reach a little less than 2000g. Unfortunately I haven&#x27;t found any realization of this.