Ammo Drum

Farming plan

Ammo Drum

Confidence

Direct sources

We assume ~2.5 min per relic opening (short fissure). Per-mission timings are labeled by source: derived from game mechanics or community-estimated.

Expected runs = 100/chance · Runs for confidence p = ⌈ln(1−p)/ln(1−chance)⌉ · In a squad of 4 opening the same relic, the chance your part shows among the reveals is 1−(1−chance)⁴.

Dropped by
Hellion Power Carrier Uncommon 6.32 %
Another Betrayer, Rotation A Rare 2.21 %
Family Reunion, Rotation A Rare 2.21 %
Hot Mess, Rotation A Rare 2.21 %
Recover The Orokin Archive, Rotation A Rare 2.21 %
Sunkiller, Rotation A Rare 2.21 %
Table For Two, Rotation A Rare 2.21 %
The Aftermath, Rotation A Rare 2.21 %
Time's Up, Rotation A Rare 2.21 %
Eidolon Vomvalyst Uncommon 1.26 %
Axio Crewman Uncommon 0.76 %
Chance of getting it by number of runs
0% 25% 50% 75% 100% 5 11 16 22 27 6 runs · 50% 6 runs · 50% 20 runs · 90% 20 runs · 90%

Each run has a 11.06% chance. The curve is 1−(1−p)ⁿ: there is never a guarantee, only growing confidence.