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Primed Chamber
Warframe · Mod

Primed Chamber

First-shot sniper damage mod

Released Jul 5, 2013

Primed Chamber adds damage to the first shot in a sniper rifle's magazine, reaching +100% at max rank. Consider it when that opening shot is an important part of your weapon use; it does not describe a bonus for every shot in the magazine.

TypeSniperPolaritymaduraiMax rank3Base drain4VariantStandardRarityRare
Primed Chamber GUIDE

Understand Primed Chamber

Useful when…

  • Boost the first shot after a magazine is loaded.
  • Compare its opening-shot bonus with a smaller version or with slot choices that improve reload behavior.

Effect and conditions

Primed Chamber is a standard-slot sniper mod with Madurai polarity, base drain 4, and max rank 3. It grants +25% damage on the first shot in the magazine at rank 0, +75% at rank 2, and +100% at rank 3. The condition is tied to the first shot in the magazine, not every shot fired.

Rank investment and alternatives

The final rank raises the listed first-shot bonus from +75% to +100%; the rank 2-to-3 step costs 120 Endo and 5,796 Credits. Charged Chamber is a separate candidate with a listed +60% first-shot bonus at max rank 5. Depleted Reload trades 60% magazine capacity for 48% reload speed, while Aero Agility grants 100% reload speed while aim gliding. Those two affect magazine capacity or reload behavior rather than the same first-shot damage condition.

wiki.warframe.com ↗

Slot planning

The bonus occupies a standard sniper mod slot. Consider how often the weapon's first magazine shot is the shot you want to strengthen, and compare that with the value of other standard-slot effects in your setup.

Limitations and tradeoffs

  • The damage bonus applies to the first shot in the magazine only.
  • It uses a standard sniper mod slot.

Common mistakes to avoid

  • Reading the +100% as a bonus to every shot in the magazine.
  • Ignoring that the bonus is conditional on the first shot.

Effects and reference details

Rank effects and investment

RankListed effectsUnpolarized drainTotal Endo from rank 0Total Credits from rank 0
0+25% Damage on first shot in Magazine400
1+50% Damage on first shot in Magazine5301,449
2+75% Damage on first shot in Magazine6904,347
3+100% Damage on first shot in Magazine721010,143

These are listed mod effects and fusion costs, not final build damage. Matching and mismatched polarities change capacity. Totals assume starting at rank 0.

References and version

Game data version: Pinned public export

Primed Chamber — WARFRAME Wiki ↗wiki.warframe.com ↗
Technical source data for verification

These machine-readable game records support the calculations and factual checks. The wiki references above are intended for reading.

Warframe Public Export ↗Raw game data (JSON) ↗wiki.warframe.com ↗

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