alt Hacker NewsThe peasant railgun has always annoyed me because real world physics have never been modelled by DnD.
So yes, your peasant railgun spear would fire at the speed of light in reality. But the game simulation doesn't care. The last peasant in the line throws the spear for 1d8 damage.
In my view, the edge cases like so (I think peasant railgun even mentioned in dm handbook) are more of a community problem than the game's. If it can be called a problem, of course - some tables enjoy those shenanigans, some don't.
What players and DMs are forgetting more often than not is the wording somewhere in the start of dm book: dm can overrule any rule. [to facilitate the game mood and direction that the table has agreed upon] [and a larger overarching problem is probably that there's often no such agreement before the game]