Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 140gr | Sierra HPBT GameKing bullet and 49 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Reloder-17 and ReloadSwiss RS 62.
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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 84% | 42,743 psi | 89% | 2635 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 43,033 psi | 90% | 2680 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 41,423 psi | 87% | 2720 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 86% | 42,482 psi | 89% | 2648 fps | 98% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 42,757 psi | 89% | 2782 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 41,756 psi | 87% | 2667 fps | 99.1% |
| Alliant Reloder-15 | <<locked>> | 84% | 42,206 psi | 88% | 2680 fps | 98.1% |
| Alliant Reloder-16 | <<locked>> | 94% | 41,408 psi | 87% | 2730 fps | 97.5% |
| Alliant Reloder-17 | <<locked>> | 90% | 41,423 psi | 87% | 2762 fps | 98.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,389 psi | 74% | 2621 fps | 97.2% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 43,192 psi | 90% | 2700 fps | 97.8% |
| Bofors RP3 | <<locked>> | 86% | 41,365 psi | 86% | 2674 fps | 99.1% |
| Hodgdon H380 | <<locked>> | 86% | 42,569 psi | 89% | 2680 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 43,149 psi | 90% | 2720 fps | 99.1% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 42,786 psi | 89% | 2730 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,201 psi | 74% | 1732 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 42,670 psi | 89% | 2661 fps | 98.9% |
| IMR 4064 | <<locked>> | 84% | 41,771 psi | 87% | 2628 fps | 98.1% |
| IMR 4831 | <<locked>> | 96% | 42,612 psi | 89% | 2723 fps | 97.7% |
| IMR 4895 | <<locked>> | 84% | 43,192 psi | 90% | 2713 fps | 98.8% |
| Lovex D073.6 | <<locked>> | 82% | 42,975 psi | 90% | 2677 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 41,597 psi | 87% | 2635 fps | 99.3% |
| Norma 201 | <<locked>> | 82% | 43,221 psi | 90% | 2651 fps | 99.5% |
| Norma 203B | <<locked>> | 84% | 41,524 psi | 87% | 2671 fps | 98.5% |
| Norma URP | <<locked>> | 94% | 41,597 psi | 87% | 2717 fps | 97.3% |
| Ramshot Big Game | <<locked>> | 84% | 41,147 psi | 86% | 2684 fps | 98.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,549 psi | 74% | 1772 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 41,162 psi | 86% | 2726 fps | 97.9% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 41,408 psi | 87% | 2772 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 41,191 psi | 86% | 2736 fps | 97% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 41,829 psi | 87% | 2753 fps | 96.3% |
| Rottweil R 902 | <<locked>> | 82% | 41,002 psi | 86% | 2598 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 88% | 41,495 psi | 87% | 2667 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 82% | 42,975 psi | 90% | 2677 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 41,597 psi | 87% | 2635 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 42,917 psi | 90% | 2726 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 42,395 psi | 89% | 2664 fps | 98.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 41,901 psi | 88% | 2562 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 42,293 psi | 88% | 2671 fps | 98.9% |
| Somchem S365 | <<locked>> | 98% | 42,250 psi | 88% | 2776 fps | 99.8% |
| Vihtavuori N135 | <<locked>> | 84% | 42,873 psi | 90% | 2631 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 40,988 psi | 86% | 2595 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 43,308 psi | 90% | 2661 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 92% | 40,857 psi | 85% | 2664 fps | 96.9% |
| Vihtavuori N540 | <<locked>> | 84% | 42,105 psi | 88% | 2635 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 42,873 psi | 90% | 2723 fps | 97.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 37,927 psi | 79% | 2700 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 41,234 psi | 86% | 2644 fps | 98.9% |
| Winchester StaBALL Match | <<locked>> | 82% | 41,814 psi | 87% | 2667 fps | 98.9% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 37,478 psi | 78% | 2539 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 35,447 psi | 74% | 2530 fps | 99.8% |
| Accurate 4350 | <<locked>> | 90% | 35,926 psi | 75% | 2605 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 35,143 psi | 73% | 2490 fps | 96% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 37,275 psi | 78% | 2657 fps | 96.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,447 psi | 72% | 2513 fps | 97.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,231 psi | 78% | 2575 fps | 96.9% |
| Alliant Reloder-16 | <<locked>> | 88% | 34,418 psi | 72% | 2562 fps | 95% |
| Alliant Reloder-17 | 42 gr | 82% | 31,821 psi | 66% | 2526 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 96% | 31,401 psi | 66% | 2516 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 40,205 psi | 84% | 2641 fps | 97.1% |
| Bofors RP3 | <<locked>> | 80% | 33,939 psi | 71% | 2516 fps | 97.5% |
| Hodgdon H380 | <<locked>> | 82% | 37,318 psi | 78% | 2569 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 29,559 psi | 62% | 2408 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,492 psi | 78% | 2618 fps | 98.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,165 psi | 55% | 1545 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,943 psi | 83% | 2605 fps | 98.5% |
| IMR 4064 | <<locked>> | 80% | 36,854 psi | 77% | 2526 fps | 96.8% |
| IMR 4831 | <<locked>> | 90% | 35,056 psi | 73% | 2566 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 38,087 psi | 80% | 2608 fps | 97.7% |
| Lovex D073.6 | <<locked>> | 80% | 39,929 psi | 83% | 2621 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 36,724 psi | 77% | 2533 fps | 98.5% |
| Norma 201 | <<locked>> | 80% | 40,509 psi | 85% | 2598 fps | 99.1% |
| Norma 203B | <<locked>> | 80% | 36,637 psi | 77% | 2566 fps | 97.3% |
| Norma URP | <<locked>> | 90% | 36,666 psi | 77% | 2612 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 35,911 psi | 75% | 2572 fps | 96.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,310 psi | 55% | 1581 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 38,392 psi | 80% | 2667 fps | 97.2% |
| ReloadSwiss RS 60 | 41 gr | 80% | 31,763 psi | 66% | 2539 fps | 98.4% |
| ReloadSwiss RS 62 | 46 gr | 90% | 35,839 psi | 75% | 2621 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 38,972 psi | 81% | 2687 fps | 95.3% |
| Rottweil R 902 | <<locked>> | 80% | 38,653 psi | 81% | 2552 fps | 98.8% |
| Rottweil R 903 | <<locked>> | 80% | 31,821 psi | 66% | 2454 fps | 96.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,929 psi | 83% | 2621 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 36,724 psi | 77% | 2533 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 32,880 psi | 69% | 2503 fps | 95.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,740 psi | 83% | 2608 fps | 98% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,650 psi | 72% | 2425 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 32,880 psi | 69% | 2467 fps | 96.6% |
| Somchem S365 | <<locked>> | 84% | 27,006 psi | 56% | 2392 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 80% | 37,623 psi | 79% | 2536 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,363 psi | 80% | 2543 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,154 psi | 65% | 2405 fps | 97.4% |
| Vihtavuori N160 | <<locked>> | 88% | 36,027 psi | 75% | 2559 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 36,985 psi | 77% | 2533 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 88% | 35,230 psi | 74% | 2559 fps | 95% |
| Vihtavuori N555 | <<locked>> | 96% | 33,373 psi | 70% | 2592 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 29,878 psi | 62% | 2379 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,160 psi | 82% | 2615 fps | 98.4% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 49 powders for 7 mm Mag. Fl. H&H loaded with the .284 | 140gr | Sierra HPBT GameKing. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,782 fps; across all powders the maximum-charge window runs from 1,732 fps to 2,782 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 49 of the 49 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 74–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.284" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Hodgdon TrailBoss, ReloadSwiss RS 14 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. ReloadSwiss RS 60, Alliant Reloder-17, ReloadSwiss RS 62 rank at the top here: for 7 mm Mag. Fl. H&H with the .284 | 140gr | Sierra HPBT GameKing they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.