Hodgdon Extreme
Hodgdon H4198
A fast-burning extruded rifle powder for small- and medium-capacity cases and short-range lever and military-pattern cartridges.
Specifications
| Manufacturer | Hodgdon |
|---|---|
| Product family | Hodgdon Extreme |
| Status | Currently produced |
| Application | rifle |
| Grain form | extruded |
| Composition | single-base |
| Temperature stable | Yes — claimed by the manufacturer |
| Burn-rate position | 90 of 198 (fastest = 1) — what this means |
| Typical cartridges | 222 Remington, 444 Marlin, 7.62x39mm |
Hodgdon shortened the kernels of the original H4198 to improve flow through powder measures while keeping the same burning speed, and reformulated it as an Extreme powder so performance holds across hot and cold ambient temperatures.
Burn rate
Fast rifle, immediately slower than IMR 4198 and faster than Vihtavuori N120.
Chart agreement: consistent across charts - listed in the same relative neighbourhood by every publisher that carries it Ranked by: Hodgdon, Vihtavuori, Shooters World, Wolfe/LoadData.
Powders charted near it — neighbours on the chart are not substitutes, and adjacency tells you nothing about what charge either one takes:
- Alliant Reloder 7 (position 87)
- Accurate LT-32 (position 88)
- IMR 4198 (position 89)
- Shooters World SOCOM (position 91)
- Vihtavuori N120 (position 92)
- Alliant Reloder TS 11 (position 93)
Sources
Other Hodgdon powders
Verify the charge, not just the recipe
Good data gets you a safe starting point. It does not tell you what actually went into the case on stroke 340 — a bridged measure, a double charge, a squib. That is what an RCM Laser Powder Check is for.