Hodgdon Extreme
Hodgdon Retumbo
A magnum extruded powder designed for very large, heavily overbored cases used in long-range hunting.
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 | 186 of 198 (fastest = 1) — what this means |
| Typical cartridges | 7mm Remington Ultra Magnum, 300 Remington Ultra Magnum, 30-378 Weatherby Magnum |
Extreme-series, so Hodgdon positions it for big-game hunting across temperature extremes. Intended for large-capacity cases only.
Burn rate
Very slow rifle, near Norma 217 and Winchester StaBALL HD.
Chart agreement: consistent across the three charts that list it Ranked by: Hodgdon, Vihtavuori, Wolfe/LoadData.
Powders charted near it — neighbours on the chart are not substitutes, and adjacency tells you nothing about what charge either one takes:
- Ramshot Grand (position 183)
- Ramshot Magnum (position 184)
- Norma 217 (position 185)
- Winchester StaBALL HD (position 187)
- IMR Enduron 8133 (position 188)
- Vihtavuori N568 (position 189)
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.