The Sniper Rifle´s recipe has a small flaw: It is the only weapon out of the 3 HM dungeon ranged weapons which becomes limited in a world, and it would be Corruption-exclusive due to it using a Musket in the recipe for the weapon used to craft it. It should either be fixed, or Sniper Skeletons would have e only able to spawn in Corruption worlds, and they would be replaced by a different kind of skeleton in Crimson worlds which would drop a material for a new weapon, which would be crafted with said material, Illegal Gun Parts and an SMG.