よくある問題Met the requirements but didn't receive the achievement.
The Achievement only works with the goggles provided from the NPCs at the Brewfest and requires the older Synthebrew Goggles. It will not work with the new XL Goggles.
Where to get the Goggles:
Alliance: Goldark Snipehunter (http://www.wowhead.com/npc=23486/goldark-snipehunter)
Horde: Glodrak Huntsniper (http://www.wowhead.com/npc=24657/glodrak-huntsniper)