Taniks seems to have infinite shots, but the auto you get for beating him seems to have gotten the short end of the stick.
22 bullets is about 8 fewer than it should have
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Sounds like Clever Dragon these days. Bungie leveled the gun by slowing its RoF. Then they turned it into a joke by truncating its magazine. After seeing about a dozen enemies escape with a tiny bit of red bar while I was reloading, I finally dismantled mine in disgust.