When using a weapon without reach, does the range of booming blade still double if you have spell sniper?
[RPG] Does the Spell Sniper feat double the range of booming blade when you are not wielding a reach weapon
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Best Answer
As of November 10th 2020, this doesn’t work.
On November 10th, 2020, booming blade was changed to have a range of self, so is no longer eligible for spell sniper. See this errata document for the Sword Coast Adventurer's Guide.
I will preserve the original answer for those who elect to ignore this errata.
The range of the spell doubles, but trivially so.
The first bullet of Spell Sniper says:
This answer goes into detail about the interaction between Spell Sniper and booming blade. The short verion is, as Rubiksmoose writes:
So it technically doubles the range of the spell, but this adjustment is entirely trivial without a reach weapon: with a reach of 5 feet, you can still only make an attack on a creature within 5 feet. Booming blade doesn’t extend the reach of your non-reach weapon, but the range of the spell is technically 10 feet with spell sniper, though it still fails if you do not make a melee attack against a creature (or cannot).
Unless you are a bugbear!
The bugbear playable race has a feature called Long-Limbed:
So even with a non-reach weapon, Spell Sniper would enable the bugbear to use booming blade on targets 10 feet away. In this case, it's actually very important to understand that the range of the spell is actually doubled.