WarframeAlchemyLab ES
Blunderbuss

Farming plan

Blunderbuss

Arsenal: Blunderbuss
Dropped by
Jackal Common 75.88 %
Another Betrayer, Rotation B Rare 8.43 %
Family Reunion, Rotation B Rare 8.43 %
Hot Mess, Rotation B Rare 8.43 %
Recover The Orokin Archive, Rotation B Rare 8.43 %
Sunkiller, Rotation B Rare 8.43 %
Table For Two, Rotation B Rare 8.43 %
The Aftermath, Rotation B Rare 8.43 %
Time's Up, Rotation B Rare 8.43 %
Arid Butcher Common 1.14 %
Frontier Butcher Common 1.14 %
Narmer Butcher Common 1.14 %
Chance of getting it by number of runs
0% 25% 50% 75% 100% 2 3 5 6 8 1 runs · 50% 1 runs · 50% 2 runs · 90% 2 runs · 90%

Each run has a 75.88% chance. The curve is 1−(1−p)ⁿ: there is never a guarantee, only growing confidence.