Master Unstoppable Long-Range Power with Hodgdon RETUMBO® Smokeless Powder

When you are reaching out to extreme long distances—whether targeting steel beyond 1,000 yards or pursuing big game across vast alpine basins—standard rifle propellants quickly run out of steam. Subpar powders produce erratic muzzle velocities, dangerous pressure spikes in hot weather, and sluggish performance in freezing conditions. Inconsistent velocity leads to wide vertical dispersion, leaving you with missed targets, wasted expensive components, and lost opportunities on the hunt of a lifetime.

Hodgdon RETUMBO® was specifically engineered to eradicate these frustrating limitations. As one of the slowest-burning and most potent extruded propellants in Hodgdon’s legendary Extreme Series, RETUMBO® is custom-tailored for massive-capacity magnum cartridges pushing heavy, high-BC (Ballistic Coefficient) bullets. Delivering unmatched thermal stability, smooth pressure curves, and explosive velocity, Hodgdon RETUMBO® provides the unstoppable, match-winning precision required by extreme long-range (ELR) marksmen and serious big-game hunters.

Why Hodgdon RETUMBO® Stands Superior for Magnum Handloaders

1. Advanced Extreme Technology™ Temperature Immunity

Environmental temperature swings are the ultimate enemy of consistent long-range ballistics. Traditional magnum powders are notorious for undergoing drastic burning-rate shifts when ambient temperatures change. A load meticulously developed in a cool spring workshop can generate dangerous pressure spikes during a mid-summer shooting match or lose critical velocity during a sub-zero late-season elk hunt.

Hodgdon RETUMBO® completely neutralizes thermal unpredictability. Formulated with cutting-edge temperature-insensitive chemical additives, RETUMBO® maintains nearly identical muzzle velocity whether you are firing in freezing sub-zero cold or blistering 100°F+ summer heat. This extreme thermal stability ensures your point of impact (POI) remains identical across every climate and season, granting you total confidence when taking the shot.

2. Slowest-Burning Extruded Geometry for Heavy-Bullet Magnums

RETUMBO® features an exceptionally slow burn rate—even slower than Hodgdon H1000®. Its specialized extruded stick geometry is designed specifically to fill large case volumes and progressively burn down the barrel, generating sustained gas pressure without early peak pressure spikes.

By delivering a prolonged pressure curve, RETUMBO® allows handloaders to extract maximum velocity and kinetic energy from heavy-for-caliber projectiles. In large-capacity, over-bored magnum cartridges, this translates directly to flatter trajectories, reduced wind drift, and devastating downrange energy transfer.

3. Tight Single-Digit Standard Deviations (SD)

Extreme long-range shooting leaves zero room for velocity variance. Hodgdon RETUMBO® is renowned across precision handloading communities for producing single-digit Standard Deviations (SD) and minimal Extreme Spreads (ES). This incredible shot-to-shot consistency eliminates vertical stringing at 1,000 yards and beyond, allowing your rifle to perform to its full mechanical potential.

4. Clean Combustion & Reduced Copper Fouling

Because big magnum cases consume large powder charges, fouling can quickly degrade barrel accuracy during extended shooting sessions. RETUMBO® burns exceptionally clean for a slow-burning propellant. Furthermore, its advanced formula contains anti-copper additives that actively prevent metallic fouling build-up inside your barrel, preserving benchrest-grade accuracy and making barrel cleaning faster and easier.

Top Caliber Applications for Hodgdon RETUMBO®

If you load large-capacity magnum rifle cartridges paired with heavy, aerodynamic match or hunting bullets, Hodgdon RETUMBO® is the premier propellant choice for your bench.

Optimal Caliber Matches:

• .300 Remington Ultra Magnum (.300 RUM): The absolute gold standard powder for pushing 200gr to 230gr projectiles to maximum velocity.

• 7mm Remington Ultra Magnum (7mm RUM): Harnesses high case capacity to launch heavy 175gr to 195gr long-range bullets with ultra-flat trajectories.

• .338 Lapua Magnum: Delivers exceptional performance, low SDs, and sustained velocity for heavy 250gr and 300gr match slugs.

• .300 Winchester Magnum & .300 PRC: Excellent for heavy-for-caliber projectiles (215gr to 225gr+) where maximum case fill and slow combustion are needed.

• 7mm Remington Magnum & 7mm STW: Unlocks extra velocity and kinetic energy with heavy 175gr+ long-range hunting bullets.

• .264 Winchester Magnum & .257 Weatherby Magnum: Provides progressive, efficient burning in severe over-bored cases.

Technical Specifications & Details

Professional Handloading Tips for RETUMBO®

• Precision Dispensing: Due to its large extruded stick kernels, RETUMBO® should ideally be weighed using an automated electronic scale/trickler system for exact grain charges down to a single kernel.

• Magnum Primers Required: Because of the large powder volumes and slow ignition characteristics of RETUMBO® charges, always pair this powder with quality Large Rifle Magnum primers to ensure fast, complete ignition.

• Consult Official Load Data: Always cross-reference your load development with published data directly from the official Hodgdon Reloading Data Center. Start at the recommended minimum charge weight and work up cautiously in small increments while monitoring for high-pressure signs on brass and primers.

Elevate Your Long-Range Magnum Loads Today

Stop letting temperature fluctuations and slow muzzle velocities compromise your extreme long-range performance. Upgrade your reloading bench with Hodgdon RETUMBO® and experience the match-grade consistency, maximum velocity, and flat downrange performance that world-class marksmen demand.

Select your container size above and buy Hodgdon RETUMBO® today to dominate long-range distance!