Buy H1000® Extreme Rifle® Powder – Hodgdon Powder Co.

Last reviewed: 2026-04-18 by Jake Terry, FFL07/SOT3, NRA-certified firearms instructor.

H1000 rifle powder sits at the slow end of the burn-rate spectrum, purpose-built for cartridges where case capacity far exceeds bore diameter. Hodgdon positions H1000 Extreme Rifle Powder as the go-to propellant for 7mm Remington Magnum, 7mm STW, 30-378 Weatherby, and similar highly-overbored designs where heavy bullets demand progressive pressure curves and complete combustion. Long-range match shooters gravitate to H1000 for its metering consistency through progressive presses and minimal velocity deviation across temperature swings — core attributes of Hodgdon’s Extreme series chemistry.

The Numbers

Hodgdon formulates H1000 with copper-reducing additives and flash suppressants, extending barrel life in high-volume match and hunting applications. The extruded grain geometry meters uniformly through volumetric measures — critical when loading 100+ rounds for extended range sessions. Expect H1000 to occupy 90–100% case capacity in most magnum applications, leaving minimal air space and maximizing energy transfer to heavy bullets. For comprehensive gun powder options across burn rates and applications, review our full propellant catalog.

Where It Shines

Long-range competitive shooters pair H1000 with 180–200 grain .284 bullets in 7mm Remington Magnum, achieving sub-half-MOA accuracy at 1,000 yards when seated to magazine length. In 300 Winchester Magnum, H1000 pushes 200–220 grain match bullets to 2,900+ fps with single-digit extreme spreads, making it the default choice for Palma and F-Class competitors. Hunters working open country with 6mm-284 Improved or 257 Weatherby Magnum report clean kills on mule deer and pronghorn past 600 yards, crediting H1000’s velocity consistency in sub-zero mountain conditions.

H1000 pairs effectively with Berger VLD, Sierra MatchKing, and Hornady ELD-Match projectiles — bullets with high ballistic coefficients that benefit from the velocity H1000 delivers without excessive pressure. In 30-378 Weatherby with 200+ grain monolithics, H1000 remains stable across temperature ranges from -20°F to +120°F, critical for African plains game where ammunition may sit in a hot truck bed before a dawn stalk. The powder’s slow burn rate allows magnum primers (Federal 215M, CCI 250) to fully ignite the charge column, ensuring complete combustion and minimal residue.

Reloading Notes

Start load development 10% below published maximums in Hodgdon’s online data center, working up in 0.5-grain increments while monitoring primer cratering and case-head expansion. H1000 occupies significant case volume — compressed loads are common in 7mm STW and 30-378 Weatherby, requiring long-drop powder measures or tricklers for precise charges. Use a chronograph to track velocity plateaus; H1000 often shows optimal accuracy 1–2 grains below maximum published loads, where SD/ES numbers tighten and vertical dispersion shrinks.

Store H1000 in factory-sealed containers below 70°F, away from solvents and heat sources. Extruded powders absorb moisture more readily than spherical types — a desiccant pack in your powder cabinet extends shelf life. Dispose of deteriorated powder (rust-colored granules, sharp ammonia smell) per local hazardous waste protocols; never burn or flush. When switching lots, re-verify charge weights on a scale calibrated to 0.1 grain — lot-to-lot variations, while minimal in Extreme powders, still occur.