And as BRK points out, the "1000" stacks aren't even labeled on the PTR yet. He says you can fill your quiver with 28,000 rounds of ammo (of course, you'd have to hit buy 140 times just to do that), but what happened to the quiver changes? Aren't Hunters supposed to get that bag slot back in 3.1 anyway?
It's all very confusing, and this smacks of a missed followthrough: the original Hunter changes as suggested were popular, but we're guessing something came up in their way (either the team was needed on another task, or some flaw in the system as designed kept them from turning consumable ammunition into a permanent item). Either way, we hope this gets fixed -- we know this is the PTR and everything is subject to change, but as it stands, it looks like we're getting a half-finished ammo system when patch 3.1 goes live.