Load Specifications
Load data in caliber 7 mm STW with .284 | 160gr | Sierra GameKing bullet and 70 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 and ReloadSwiss RS 80.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 90% | 57,972 psi | 87% | 2858 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 58,494 psi | 88% | 2881 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 57,725 psi | 87% | 2966 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 88% | 59,408 psi | 89% | 2946 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 57,653 psi | 86% | 2959 fps | 99.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 60,162 psi | 90% | 2989 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 52,533 psi | 79% | 2963 fps | 96.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 54,505 psi | 82% | 2946 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 59,437 psi | 89% | 2933 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 58,885 psi | 88% | 2933 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 58,001 psi | 87% | 2953 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 59,727 psi | 90% | 2910 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 59,988 psi | 90% | 2982 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 56,623 psi | 85% | 2946 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 58,102 psi | 87% | 3018 fps | 98% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 58,262 psi | 87% | 2917 fps | 98.1% |
| Bofors RP15 | <<locked>> | 92% | 57,188 psi | 86% | 2940 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 59,611 psi | 89% | 2995 fps | 99.9% |
| Bofors RP5 | <<locked>> | 90% | 58,001 psi | 87% | 2953 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 59,292 psi | 89% | 2874 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 57,783 psi | 87% | 2953 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 59,683 psi | 89% | 2933 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 56,826 psi | 85% | 2890 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 90% | 59,698 psi | 89% | 2933 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 59,466 psi | 89% | 2851 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 58,885 psi | 88% | 3071 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,550 psi | 56% | 1844 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 57,870 psi | 87% | 2864 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 58,479 psi | 88% | 2867 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 57,348 psi | 86% | 2871 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 92% | 59,770 psi | 90% | 2995 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 49,966 psi | 75% | 2864 fps | 99.1% |
| Lovex S065 | <<locked>> | 82% | 58,073 psi | 87% | 2841 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 60,075 psi | 90% | 2894 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 59,422 psi | 89% | 2877 fps | 100% |
| Norma 204 | <<locked>> | 84% | 59,306 psi | 89% | 2923 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 50,749 psi | 76% | 2887 fps | 100% |
| Norma MRP | <<locked>> | 88% | 58,218 psi | 87% | 2969 fps | 100% |
| Norma URP | <<locked>> | 84% | 60,104 psi | 90% | 2907 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 56,956 psi | 85% | 2959 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 84% | 59,161 psi | 89% | 2920 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 59,799 psi | 90% | 2949 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,421 psi | 58% | 1886 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 58,726 psi | 88% | 2904 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 57,159 psi | 86% | 2927 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 60,133 psi | 90% | 3061 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 59,553 psi | 89% | 3025 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 88% | 59,799 psi | 90% | 2913 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 88% | 58,552 psi | 88% | 2923 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 59,292 psi | 89% | 2874 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 58,073 psi | 87% | 2841 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 60,075 psi | 90% | 2894 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 57,072 psi | 86% | 2799 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 58,146 psi | 87% | 2920 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 57,711 psi | 87% | 2848 fps | 99.3% |
| Somchem S365 | <<locked>> | 84% | 57,798 psi | 87% | 2861 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 58,842 psi | 88% | 2894 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 58,088 psi | 87% | 2851 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 58,769 psi | 88% | 2877 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 57,928 psi | 87% | 2894 fps | 96.4% |
| Vihtavuori N550 | <<locked>> | 82% | 57,217 psi | 86% | 2851 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 57,769 psi | 87% | 2887 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 57,638 psi | 86% | 2969 fps | 99.5% |
| Vihtavuori N565 | <<locked>> | 94% | 58,218 psi | 87% | 2956 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 98% | 59,843 psi | 90% | 3025 fps | 99.3% |
| Vihtavuori N570 | <<locked>> | 98% | 56,927 psi | 85% | 3022 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 57,392 psi | 86% | 2795 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 59,930 psi | 90% | 2936 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 59,843 psi | 90% | 3002 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 59,016 psi | 88% | 2894 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 41,321 psi | 62% | 2589 fps | 99.6% |
| Accurate 4350 | <<locked>> | 80% | 54,520 psi | 82% | 2825 fps | 100% |
| Accurate MAGPRO | <<locked>> | 82% | 43,540 psi | 65% | 2713 fps | 95.6% |
| ADI AR 2209 | <<locked>> | 80% | 45,397 psi | 68% | 2717 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 80% | 40,596 psi | 61% | 2651 fps | 96.6% |
| ADI AR 2217 | <<locked>> | 86% | 37,188 psi | 56% | 2569 fps | 95.8% |
| ADI AR 2218 | <<locked>> | 98% | 48,689 psi | 73% | 2887 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 82% | 29,602 psi | 44% | 2411 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 52,083 psi | 78% | 2828 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,266 psi | 68% | 2710 fps | 98.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 41,263 psi | 62% | 2657 fps | 98% |
| Alliant Reloder-23 | <<locked>> | 80% | 40,059 psi | 60% | 2608 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,650 psi | 52% | 2539 fps | 99.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 45,121 psi | 68% | 2769 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 46,267 psi | 69% | 2815 fps | 95.1% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 45,150 psi | 68% | 2684 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 38,435 psi | 58% | 2595 fps | 97.1% |
| Bofors RP30 | <<locked>> | 84% | 36,970 psi | 55% | 2582 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 41,263 psi | 62% | 2657 fps | 98% |
| Bofors RP7 | <<locked>> | 80% | 55,666 psi | 83% | 2825 fps | 100% |
| Hodgdon H1000 | <<locked>> | 82% | 35,259 psi | 53% | 2526 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 80% | 55,825 psi | 84% | 2877 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 43,337 psi | 65% | 2657 fps | 96.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 42,438 psi | 64% | 2638 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 49,037 psi | 74% | 2707 fps | 100% |
| Hodgdon Retumbo | 65.7 gr | 80% | 33,794 psi | 51% | 2569 fps | 96.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,166 psi | 42% | 1654 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 51,111 psi | 77% | 2759 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 51,459 psi | 77% | 2766 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 44,483 psi | 67% | 2651 fps | 97.2% |
| IMR 7828 SSC | <<locked>> | 80% | 39,363 psi | 59% | 2631 fps | 96.3% |
| IMR 8133 Enduron | <<locked>> | 90% | 35,418 psi | 53% | 2566 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 54,607 psi | 82% | 2792 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 53,069 psi | 80% | 2792 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 35,665 psi | 53% | 2467 fps | 98.6% |
| Norma 204 | <<locked>> | 80% | 51,938 psi | 78% | 2812 fps | 99.5% |
| Norma 217 | <<locked>> | 86% | 31,125 psi | 47% | 2474 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 43,874 psi | 66% | 2733 fps | 99.4% |
| Norma URP | <<locked>> | 80% | 52,866 psi | 79% | 2805 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 39,262 psi | 59% | 2641 fps | 96.7% |
| Ramshot Hunter | <<locked>> | 80% | 51,938 psi | 78% | 2815 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 35,215 psi | 53% | 2520 fps | 97.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,848 psi | 43% | 1690 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 54,636 psi | 82% | 2844 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 53,214 psi | 80% | 2871 fps | 100% |
| ReloadSwiss RS 76 | 70.3 gr | 80% | 32,996 psi | 49% | 2539 fps | 97.2% |
| ReloadSwiss RS 80 | 77.9 gr | 88% | 40,495 psi | 61% | 2690 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 46,282 psi | 69% | 2690 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 80% | 44,817 psi | 67% | 2697 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 80% | 55,666 psi | 83% | 2825 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 54,607 psi | 82% | 2792 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 53,069 psi | 80% | 2792 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,563 psi | 80% | 2746 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,469 psi | 67% | 2694 fps | 98.7% |
| Somchem S361 | <<locked>> | 80% | 47,268 psi | 71% | 2680 fps | 97.7% |
| Somchem S365 | <<locked>> | 80% | 50,604 psi | 76% | 2762 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 45,266 psi | 68% | 2677 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 80% | 54,288 psi | 81% | 2795 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 39,479 psi | 59% | 2552 fps | 98.1% |
| Vihtavuori N170 | <<locked>> | 94% | 54,143 psi | 81% | 2835 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 53,534 psi | 80% | 2799 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 44,498 psi | 67% | 2684 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 43,642 psi | 65% | 2723 fps | 97% |
| Vihtavuori N565 | <<locked>> | 82% | 38,754 psi | 58% | 2602 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 88% | 41,858 psi | 63% | 2707 fps | 95.4% |
| Vihtavuori N570 | <<locked>> | 94% | 49,255 psi | 74% | 2887 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 53,722 psi | 81% | 2749 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 56,014 psi | 84% | 2877 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 37,826 psi | 57% | 2657 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 41,655 psi | 62% | 2605 fps | 98.1% |
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 70 powders for 7 mm STW loaded with the .284 | 160gr | Sierra GameKing. Hodgdon Retumbo delivers the highest muzzle velocity at 3,071 fps; across all powders the maximum-charge window runs from 1,844 fps to 3,071 fps. ADI AR 2217 gives the best case fill at 100 %, and 70 of the 70 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (460 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 160.0 gr projectile in 0.284" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2218, ADI AR 2225 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. Hodgdon Retumbo, ReloadSwiss RS 76, ReloadSwiss RS 80 rank at the top here: for 7 mm STW with the .284 | 160gr | Sierra 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.