Load Specifications
Load data in caliber 7 mm Mag. Fl. H&H with .284 | 100gr | Sierra VarmintKing bullet and 43 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 2015 | <<locked>> | 82% | 41,292 psi | 86% | 3048 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 41,031 psi | 86% | 3094 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 43,221 psi | 90% | 3153 fps | 98.8% |
| Accurate 4064 | <<locked>> | 90% | 41,162 psi | 86% | 3127 fps | 99.2% |
| ADI Benchmark 8208 | <<locked>> | 84% | 42,873 psi | 90% | 3114 fps | 97.2% |
| Alliant AR-Comp | <<locked>> | 84% | 41,408 psi | 87% | 3133 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 43,120 psi | 90% | 3166 fps | 97% |
| Bofors RP3 | <<locked>> | 92% | 42,888 psi | 90% | 3173 fps | 97.1% |
| Hodgdon Benchmark | <<locked>> | 82% | 42,366 psi | 89% | 3058 fps | 97.6% |
| Hodgdon BL-C2 | <<locked>> | 84% | 41,031 psi | 86% | 3127 fps | 97.4% |
| Hodgdon H4895 | <<locked>> | 84% | 40,930 psi | 86% | 3104 fps | 95.9% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 41,901 psi | 88% | 3179 fps | 96.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,055 psi | 71% | 2077 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 42,090 psi | 88% | 3110 fps | 96.2% |
| IMR 3031 | <<locked>> | 86% | 42,192 psi | 88% | 3179 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 84% | 42,873 psi | 90% | 3114 fps | 97.2% |
| Lovex D073.6 | <<locked>> | 86% | 41,539 psi | 87% | 3127 fps | 98.5% |
| Lovex S062 | <<locked>> | 90% | 43,120 psi | 90% | 3133 fps | 97.4% |
| Norma 201 | <<locked>> | 86% | 42,206 psi | 88% | 3100 fps | 97.1% |
| Norma 202 | <<locked>> | 86% | 42,395 psi | 89% | 3123 fps | 99.1% |
| Norma 203B | <<locked>> | 90% | 43,004 psi | 90% | 3169 fps | 96% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,389 psi | 72% | 2129 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 43,265 psi | 90% | 3268 fps | 98.7% |
| Rottweil R 901 | <<locked>> | 82% | 40,915 psi | 85% | 3054 fps | 98.6% |
| Rottweil R 902 | <<locked>> | 88% | 42,641 psi | 89% | 3100 fps | 97.2% |
| Rottweil R 903 | <<locked>> | 94% | 42,772 psi | 89% | 3159 fps | 96.7% |
| Shooters World Match Rifle | <<locked>> | 86% | 41,539 psi | 87% | 3127 fps | 98.5% |
| Shooters World Precision | <<locked>> | 90% | 43,120 psi | 90% | 3133 fps | 97.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 41,684 psi | 87% | 3018 fps | 98.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 41,234 psi | 86% | 3018 fps | 99.5% |
| Somchem S321 | <<locked>> | 82% | 43,221 psi | 90% | 3143 fps | 97.6% |
| Somchem S335 | <<locked>> | 84% | 41,046 psi | 86% | 3022 fps | 99.4% |
| Somchem S341 | <<locked>> | 86% | 43,236 psi | 90% | 3123 fps | 95.8% |
| Somchem S355 | <<locked>> | 92% | 40,973 psi | 86% | 3104 fps | 95.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 38,058 psi | 80% | 3123 fps | 96.4% |
| Vihtavuori N133 | <<locked>> | 84% | 41,640 psi | 87% | 3025 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 41,191 psi | 86% | 3094 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 42,670 psi | 89% | 3100 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 94% | 42,119 psi | 88% | 3097 fps | 97.7% |
| Vihtavuori N530 | <<locked>> | 84% | 42,931 psi | 90% | 3110 fps | 97.3% |
| Vihtavuori N540 | <<locked>> | 88% | 41,350 psi | 86% | 3084 fps | 98.9% |
| Winchester 748 | <<locked>> | 84% | 41,553 psi | 87% | 3150 fps | 97.8% |
| Winchester StaBALL Match | <<locked>> | 86% | 40,973 psi | 86% | 3110 fps | 96% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 38,812 psi | 81% | 2992 fps | 99.8% |
| Accurate 2495 | <<locked>> | 80% | 31,241 psi | 65% | 2858 fps | 98.9% |
| Accurate 2520 | <<locked>> | 80% | 37,536 psi | 78% | 3022 fps | 97.6% |
| Accurate 4064 | <<locked>> | 80% | 29,559 psi | 62% | 2822 fps | 96% |
| ADI Benchmark 8208 | <<locked>> | 80% | 37,637 psi | 79% | 2989 fps | 95.7% |
| Alliant AR-Comp | <<locked>> | 80% | 36,143 psi | 76% | 3018 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 38,000 psi | 79% | 3048 fps | 95.5% |
| Bofors RP3 | <<locked>> | 88% | 37,420 psi | 78% | 3041 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 39,740 psi | 83% | 2995 fps | 97% |
| Hodgdon BL-C2 | <<locked>> | 80% | 35,505 psi | 74% | 2986 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 82% | 38,319 psi | 80% | 3041 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 39,262 psi | 82% | 3114 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,164 psi | 53% | 1860 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 39,378 psi | 82% | 3048 fps | 95.4% |
| IMR 3031 | <<locked>> | 80% | 34,360 psi | 72% | 2992 fps | 98.9% |
| IMR 8208 XBR | <<locked>> | 80% | 37,637 psi | 79% | 2989 fps | 95.7% |
| Lovex D073.6 | <<locked>> | 80% | 33,692 psi | 70% | 2933 fps | 96.3% |
| Lovex S062 | <<locked>> | 84% | 35,665 psi | 75% | 2953 fps | 95.1% |
| Norma 201 | <<locked>> | 82% | 37,260 psi | 78% | 2979 fps | 95.7% |
| Norma 202 | <<locked>> | 80% | 34,925 psi | 73% | 2943 fps | 97.5% |
| Norma 203B | <<locked>> | 88% | 40,524 psi | 85% | 3110 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,338 psi | 53% | 1906 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 33,330 psi | 70% | 2989 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 38,551 psi | 81% | 2999 fps | 98.1% |
| Rottweil R 902 | <<locked>> | 82% | 35,491 psi | 74% | 2923 fps | 95% |
| Rottweil R 903 | <<locked>> | 90% | 37,304 psi | 78% | 3031 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 33,692 psi | 70% | 2933 fps | 96.3% |
| Shooters World Precision | <<locked>> | 84% | 35,665 psi | 75% | 2953 fps | 95.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 36,666 psi | 77% | 2904 fps | 97.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,907 psi | 62% | 2736 fps | 96.9% |
| Somchem S321 | <<locked>> | 80% | 40,277 psi | 84% | 3074 fps | 96.9% |
| Somchem S335 | <<locked>> | 80% | 36,085 psi | 75% | 2904 fps | 98.5% |
| Somchem S341 | <<locked>> | 84% | 40,538 psi | 85% | 3064 fps | 95% |
| Somchem S355 | <<locked>> | 90% | 38,609 psi | 81% | 3048 fps | 95.2% |
| Somchem S365 | <<locked>> | 98% | 35,679 psi | 75% | 3054 fps | 95.4% |
| Vihtavuori N133 | <<locked>> | 80% | 36,666 psi | 77% | 2913 fps | 99.6% |
| Vihtavuori N135 | <<locked>> | 80% | 31,763 psi | 66% | 2867 fps | 99% |
| Vihtavuori N140 | <<locked>> | 80% | 32,895 psi | 69% | 2867 fps | 97.2% |
| Vihtavuori N150 | <<locked>> | 88% | 34,403 psi | 72% | 2913 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 37,550 psi | 78% | 2982 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 31,662 psi | 66% | 2841 fps | 96.2% |
| Winchester 748 | <<locked>> | 80% | 36,172 psi | 76% | 3015 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 84% | 38,363 psi | 80% | 3048 fps | 95.2% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 74 powders for 7 mm Mag. Fl. H&H loaded with the .284 | 100gr | Sierra VarmintKing. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,268 fps; across all powders the maximum-charge window runs from 2,077 fps to 3,268 fps. Accurate 4350 gives the best case fill at 100 %, and 74 of the 74 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 71–90 %, leaving at least 10 % headroom. The 100.0 gr projectile in 0.284" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Hodgdon Hybrid 100V 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. As outliers, Accurate 4350, ADI AR 2208, Alliant Power Pro 2000-MR burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.