Is it possible for a roll to just not be in my personal loot pool? I've run the master nightfall 72 times this week. I've gotten every combination of the last two perks possible multiple times over except for feeding frenzy/reservoir burst. I've just about given up. The other night I farmed with two guys from LFG and one got back to back feeding frenzy/reservoir burst rolls. It might be different if I was farming for a perfect 4 perk + masterwork version of the gun, but at this point I'd be happy with the last two perks together in the same gun. It's driving me nuts.