Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 168gr | Sierra MatchKing bullet and 47 powders. The key underlying parameters are shown in the table above.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
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Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 98% | 40,611 psi | 85% | 2467 fps | 97.5% |
| Accurate 4350 | <<locked>> | 90% | 43,308 psi | 90% | 2530 fps | 99.3% |
| ADI AR 2208 | <<locked>> | 82% | 42,656 psi | 89% | 2434 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 42,496 psi | 89% | 2454 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 42,250 psi | 88% | 2533 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 86% | 42,337 psi | 88% | 2556 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 41,539 psi | 87% | 2549 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 36,434 psi | 76% | 2454 fps | 96.8% |
| Alliant Reloder-26 | <<locked>> | 98% | 43,236 psi | 90% | 2651 fps | 99.3% |
| Bofors RP3 | <<locked>> | 82% | 42,467 psi | 89% | 2464 fps | 100% |
| Bofors RP7 | <<locked>> | 86% | 42,931 psi | 90% | 2438 fps | 96.4% |
| Hodgdon H380 | <<locked>> | 82% | 43,062 psi | 90% | 2467 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 88% | 42,859 psi | 90% | 2520 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 41,843 psi | 87% | 2474 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 88% | 42,264 psi | 88% | 2536 fps | 96.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,679 psi | 75% | 1585 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 43,221 psi | 90% | 2467 fps | 96.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 42,148 psi | 88% | 2421 fps | 96.6% |
| IMR 4831 | <<locked>> | 90% | 41,437 psi | 87% | 2477 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 41,640 psi | 87% | 2421 fps | 97.9% |
| Lovex S070 | <<locked>> | 88% | 42,134 psi | 88% | 2451 fps | 97.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 36,318 psi | 76% | 2385 fps | 96.4% |
| Norma MRP | <<locked>> | 98% | 43,221 psi | 90% | 2608 fps | 97.1% |
| Norma URP | <<locked>> | 90% | 43,004 psi | 90% | 2520 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 90% | 41,887 psi | 88% | 2513 fps | 97.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,477 psi | 76% | 1627 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 41,930 psi | 88% | 2552 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 42,656 psi | 89% | 2543 fps | 99.1% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 42,366 psi | 89% | 2559 fps | 98.7% |
| Rottweil R 903 | <<locked>> | 84% | 42,627 psi | 89% | 2461 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 86% | 42,931 psi | 90% | 2438 fps | 96.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 41,640 psi | 87% | 2421 fps | 97.9% |
| Shooters World SW4350 | <<locked>> | 88% | 42,134 psi | 88% | 2451 fps | 97.1% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 41,031 psi | 86% | 2464 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 42,148 psi | 88% | 2339 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 41,089 psi | 86% | 2372 fps | 96.5% |
| Somchem S355 | <<locked>> | 82% | 40,596 psi | 85% | 2415 fps | 99.7% |
| Somchem S365 | <<locked>> | 92% | 41,176 psi | 86% | 2526 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 40,901 psi | 85% | 2464 fps | 95.9% |
| Vihtavuori N150 | <<locked>> | 84% | 41,278 psi | 86% | 2398 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 42,119 psi | 88% | 2467 fps | 99% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 42,859 psi | 90% | 2484 fps | 95.9% |
| Vihtavuori N550 | <<locked>> | 88% | 41,307 psi | 86% | 2470 fps | 98.7% |
| Vihtavuori N555 | <<locked>> | 98% | 42,873 psi | 90% | 2566 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 41,597 psi | 87% | 2444 fps | 99.9% |
| Winchester 760 | <<locked>> | 88% | 42,859 psi | 90% | 2520 fps | 97.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,115 psi | 78% | 2575 fps | 100% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 92% | 33,170 psi | 69% | 2316 fps | 95.2% |
| Accurate 4350 | <<locked>> | 80% | 30,632 psi | 64% | 2267 fps | 96.2% |
| ADI AR 2208 | <<locked>> | 80% | 40,219 psi | 84% | 2388 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,030 psi | 84% | 2408 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 31,067 psi | 65% | 2283 fps | 96.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 34,519 psi | 72% | 2398 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 84% | 25,483 psi | 53% | 2159 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 98% | 34,432 psi | 72% | 2405 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 88% | 30,676 psi | 64% | 2362 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 39,653 psi | 83% | 2415 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 40,480 psi | 85% | 2392 fps | 95.7% |
| Hodgdon H380 | <<locked>> | 80% | 40,335 psi | 84% | 2418 fps | 98.4% |
| Hodgdon H414 | <<locked>> | 84% | 37,536 psi | 78% | 2418 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,427 psi | 59% | 2188 fps | 97.1% |
| Hodgdon Superformance | <<locked>> | 86% | 39,349 psi | 82% | 2477 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,774 psi | 56% | 1417 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 38,232 psi | 80% | 2372 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 37,043 psi | 77% | 2323 fps | 95.1% |
| IMR 4831 | <<locked>> | 80% | 29,950 psi | 63% | 2234 fps | 96% |
| Lovex S065 | <<locked>> | 80% | 34,780 psi | 73% | 2280 fps | 96% |
| Lovex S070 | <<locked>> | 84% | 37,246 psi | 78% | 2356 fps | 95.7% |
| Lovex S071 | <<locked>> | 98% | 34,084 psi | 71% | 2336 fps | 95.6% |
| Norma MRP | <<locked>> | 94% | 37,956 psi | 79% | 2500 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 31,082 psi | 65% | 2274 fps | 96.2% |
| Ramshot Hunter | <<locked>> | 84% | 34,505 psi | 72% | 2359 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,035 psi | 56% | 1447 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,709 psi | 77% | 2451 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 30,472 psi | 64% | 2287 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 32,561 psi | 68% | 2339 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 80% | 37,478 psi | 78% | 2365 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 84% | 40,480 psi | 85% | 2392 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 34,780 psi | 73% | 2280 fps | 96% |
| Shooters World SW4350 | <<locked>> | 84% | 37,246 psi | 78% | 2356 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,421 psi | 80% | 2415 fps | 99.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,653 psi | 83% | 2300 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 36,158 psi | 76% | 2277 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 38,232 psi | 80% | 2369 fps | 99.5% |
| Somchem S365 | <<locked>> | 80% | 27,862 psi | 58% | 2231 fps | 98.3% |
| Somchem S385 | <<locked>> | 92% | 38,319 psi | 80% | 2411 fps | 95.1% |
| Vihtavuori N150 | <<locked>> | 80% | 36,347 psi | 76% | 2310 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 32,372 psi | 68% | 2270 fps | 96.6% |
| Vihtavuori N165 | <<locked>> | 98% | 40,118 psi | 84% | 2434 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 31,763 psi | 66% | 2270 fps | 96.1% |
| Vihtavuori N555 | <<locked>> | 84% | 27,122 psi | 57% | 2221 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,097 psi | 67% | 2251 fps | 98.5% |
| Winchester 760 | <<locked>> | 84% | 37,782 psi | 79% | 2421 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 88% | 25,367 psi | 53% | 2224 fps | 95.7% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 47 powders for 7 mm Mag. Fl. H&H loaded with the .284 | 168gr | Sierra MatchKing. Alliant Reloder-26 delivers the highest muzzle velocity at 2,651 fps; across all powders the maximum-charge window runs from 1,585 fps to 2,651 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 47 of the 47 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 75–90 %, leaving at least 10 % headroom. The 168.0 gr projectile in 0.284" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-25, Hodgdon TrailBoss reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.