Possibly.
I practically never use railroad guns. Simply because they do not damage anything and you need to stack 3 at least, before you get anywhere with it. But they anyway have uses:
1) Enemy rail guns;
2) A coastline defense;
3) Crossfire, etc.
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The Problem with Railroad Guns https://essays.agency https://www.reddit.com/r/CallOfWar/comments/hzeyz9/rocket_vs_railroad_gun