IMR Classic
IMR 4350
Hodgdon presents IMR 4350 as its first choice for the short magnum family from both Remington and Winchester, and for magnum cartridges loaded with light to medium bullet weights.
Specifications
| Manufacturer | IMR |
|---|---|
| Product family | IMR Classic |
| Status | Currently produced |
| Application | rifle |
| Grain form | extruded |
| Composition | single-base |
| Temperature stable | Not marketed as temperature-stable |
| Burn-rate position | 148 of 198 (fastest = 1) — what this means |
| Typical cartridges | 7mm Remington Short Action Ultra Magnum, 300 Winchester Short Magnum, 270 Winchester, 30-06 Springfield |
Extruded single-base, in production since 1940, made in Canada. Not listed as temperature stable or subsonic-rated.
Burn rate
Medium-to-slow, at the fast end of the magnum rifle range and just faster than IMR Enduron 4451.
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:
- Accurate 2700 (position 145)
- Norma URP (position 146)
- Vihtavuori N550 (position 147)
- IMR Enduron 4451 (position 149)
- Alliant Reloder 16 (position 150)
- Hodgdon H4350 (position 151)
Sources
Other IMR 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.