I went through Mogu’Shan Vaults and despite having at least 1 shot on all bosses received no loot. I wasn’t rolling for any loot, did not leave the instance, or anything that readily explains why this happened. I was on a lvl 27 after first doing the Raid Finder at lvl 25, where I did get loot. I also checked my mailbox, still no loot from this Raid run. I have since hit 70, so not that big of a deal, but was very disappointed that I lost out on the loot.