Load Specifications
Load data in caliber 7 mm STW with .284 | 160gr | North Fork FPS bullet and 71 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 Accurate MAGPRO.
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% | 57,928 psi | 87% | 2854 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 58,450 psi | 88% | 2877 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 57,711 psi | 87% | 2963 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 88% | 59,364 psi | 89% | 2943 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 57,609 psi | 86% | 2956 fps | 99.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 60,147 psi | 90% | 2986 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 52,475 psi | 79% | 2959 fps | 96.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 54,520 psi | 82% | 2946 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 59,408 psi | 89% | 2930 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 58,871 psi | 88% | 2933 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 57,986 psi | 87% | 2949 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 59,683 psi | 89% | 2910 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 60,002 psi | 90% | 2982 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 56,579 psi | 85% | 2946 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 58,073 psi | 87% | 3015 fps | 98% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 58,218 psi | 87% | 2913 fps | 98.1% |
| Bofors RP15 | <<locked>> | 92% | 57,145 psi | 86% | 2936 fps | 99.9% |
| Bofors RP30 | <<locked>> | 98% | 59,625 psi | 89% | 2995 fps | 99.9% |
| Bofors RP5 | <<locked>> | 90% | 57,986 psi | 87% | 2949 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 59,263 psi | 89% | 2874 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 57,754 psi | 87% | 2949 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 59,669 psi | 89% | 2933 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 56,782 psi | 85% | 2890 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 90% | 59,669 psi | 89% | 2933 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 59,480 psi | 89% | 2848 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 58,842 psi | 88% | 3068 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,536 psi | 56% | 1844 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 57,841 psi | 87% | 2864 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 58,697 psi | 88% | 2867 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 57,348 psi | 86% | 2871 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 92% | 59,988 psi | 90% | 2999 fps | 99.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 49,966 psi | 75% | 2861 fps | 99.1% |
| Lovex S065 | <<locked>> | 82% | 58,059 psi | 87% | 2841 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 60,292 psi | 90% | 2894 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 59,364 psi | 89% | 2874 fps | 100% |
| Norma 204 | <<locked>> | 84% | 59,263 psi | 89% | 2923 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 50,749 psi | 76% | 2884 fps | 100% |
| Norma MRP | <<locked>> | 88% | 58,175 psi | 87% | 2966 fps | 100% |
| Norma URP | <<locked>> | 84% | 60,321 psi | 90% | 2910 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 57,188 psi | 86% | 2963 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 84% | 59,132 psi | 89% | 2917 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 59,814 psi | 90% | 2949 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,595 psi | 58% | 1890 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 58,682 psi | 88% | 2900 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 57,116 psi | 86% | 2923 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 60,365 psi | 90% | 3064 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 59,538 psi | 89% | 3025 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 88% | 60,002 psi | 90% | 2913 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 88% | 58,508 psi | 88% | 2923 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 59,263 psi | 89% | 2874 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 58,059 psi | 87% | 2841 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 60,292 psi | 90% | 2894 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 57,000 psi | 85% | 2795 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 58,102 psi | 87% | 2920 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 57,682 psi | 86% | 2848 fps | 99.3% |
| Somchem S365 | <<locked>> | 84% | 57,769 psi | 87% | 2858 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 59,059 psi | 89% | 2894 fps | 100% |
| Unknown powder | <<locked>> | 82% | 60,162 psi | 90% | 2910 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 58,102 psi | 87% | 2851 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 58,726 psi | 88% | 2877 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 57,885 psi | 87% | 2894 fps | 96.4% |
| Vihtavuori N550 | <<locked>> | 82% | 57,174 psi | 86% | 2851 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 57,986 psi | 87% | 2890 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 57,595 psi | 86% | 2969 fps | 99.5% |
| Vihtavuori N565 | <<locked>> | 94% | 58,436 psi | 88% | 2959 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 98% | 60,060 psi | 90% | 3025 fps | 99.3% |
| Vihtavuori N570 | <<locked>> | 98% | 56,869 psi | 85% | 3018 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 57,595 psi | 86% | 2799 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 59,901 psi | 90% | 2936 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 59,886 psi | 90% | 3002 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 58,972 psi | 88% | 2890 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% | 54,476 psi | 82% | 2822 fps | 100% |
| Accurate MAGPRO | 71.2 gr | 82% | 43,555 psi | 65% | 2713 fps | 95.6% |
| ADI AR 2209 | <<locked>> | 80% | 45,368 psi | 68% | 2717 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 80% | 40,567 psi | 61% | 2651 fps | 96.6% |
| ADI AR 2217 | <<locked>> | 86% | 37,159 psi | 56% | 2569 fps | 95.8% |
| ADI AR 2218 | <<locked>> | 98% | 48,849 psi | 73% | 2890 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 82% | 29,588 psi | 44% | 2411 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 52,040 psi | 78% | 2825 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,237 psi | 68% | 2707 fps | 98.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 41,234 psi | 62% | 2657 fps | 98% |
| Alliant Reloder-23 | <<locked>> | 80% | 40,059 psi | 60% | 2608 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,621 psi | 52% | 2536 fps | 99% |
| Alliant Reloder-26 | <<locked>> | 80% | 45,092 psi | 68% | 2762 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 46,253 psi | 69% | 2812 fps | 95.1% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 45,121 psi | 68% | 2684 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 38,421 psi | 58% | 2592 fps | 97% |
| Bofors RP30 | <<locked>> | 84% | 36,985 psi | 55% | 2582 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 41,234 psi | 62% | 2657 fps | 98% |
| Bofors RP7 | <<locked>> | 80% | 55,680 psi | 83% | 2822 fps | 100% |
| Hodgdon H1000 | <<locked>> | 82% | 35,230 psi | 53% | 2526 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 55,796 psi | 84% | 2874 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 43,323 psi | 65% | 2654 fps | 96.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 42,424 psi | 64% | 2638 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 49,052 psi | 74% | 2703 fps | 100% |
| Hodgdon Retumbo | 65.7 gr | 80% | 33,808 psi | 51% | 2566 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,166 psi | 42% | 1650 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 51,068 psi | 77% | 2759 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 51,416 psi | 77% | 2766 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 44,483 psi | 67% | 2651 fps | 97.2% |
| IMR 7828 SSC | <<locked>> | 80% | 39,334 psi | 59% | 2631 fps | 96.2% |
| IMR 8133 Enduron | <<locked>> | 90% | 35,418 psi | 53% | 2566 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 54,563 psi | 82% | 2792 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 53,040 psi | 80% | 2789 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 35,679 psi | 53% | 2467 fps | 98.6% |
| Norma 204 | <<locked>> | 80% | 51,895 psi | 78% | 2808 fps | 99.5% |
| Norma 217 | <<locked>> | 86% | 31,096 psi | 47% | 2470 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 43,830 psi | 66% | 2730 fps | 99.4% |
| Norma URP | <<locked>> | 80% | 52,852 psi | 79% | 2805 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 39,262 psi | 59% | 2638 fps | 96.6% |
| Ramshot Hunter | <<locked>> | 80% | 51,953 psi | 78% | 2812 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 35,346 psi | 53% | 2523 fps | 97.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,834 psi | 43% | 1690 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 54,839 psi | 82% | 2844 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 53,229 psi | 80% | 2871 fps | 100% |
| ReloadSwiss RS 76 | 70.3 gr | 80% | 32,982 psi | 49% | 2539 fps | 97.2% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 40,683 psi | 61% | 2694 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 46,267 psi | 69% | 2690 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 80% | 44,788 psi | 67% | 2694 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 80% | 55,680 psi | 83% | 2822 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 54,563 psi | 82% | 2792 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 53,040 psi | 80% | 2789 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,519 psi | 80% | 2746 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,440 psi | 67% | 2690 fps | 98.7% |
| Somchem S361 | <<locked>> | 80% | 47,239 psi | 71% | 2680 fps | 97.7% |
| Somchem S365 | <<locked>> | 80% | 50,618 psi | 76% | 2759 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 45,237 psi | 68% | 2674 fps | 99.3% |
| Unknown powder | <<locked>> | 80% | 56,217 psi | 84% | 2858 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 54,244 psi | 81% | 2795 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 39,479 psi | 59% | 2549 fps | 98% |
| Vihtavuori N170 | <<locked>> | 94% | 54,099 psi | 81% | 2831 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 53,737 psi | 81% | 2802 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 44,657 psi | 67% | 2684 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 43,613 psi | 65% | 2720 fps | 97% |
| Vihtavuori N565 | <<locked>> | 82% | 38,725 psi | 58% | 2598 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 88% | 41,858 psi | 63% | 2707 fps | 95.4% |
| Vihtavuori N570 | <<locked>> | 94% | 49,211 psi | 74% | 2887 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 53,693 psi | 80% | 2746 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 56,028 psi | 84% | 2877 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 37,811 psi | 57% | 2654 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 41,655 psi | 62% | 2602 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 71 powders for 7 mm STW loaded with the .284 | 160gr | North Fork FPS. Hodgdon Retumbo delivers the highest muzzle velocity at 3,068 fps; across all powders the maximum-charge window runs from 1,844 fps to 3,068 fps. ADI AR 2217 gives the best case fill at 100 %, and 71 of the 71 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 1:11.5 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, Accurate MAGPRO rank at the top here: for 7 mm STW with the .284 | 160gr | North Fork FPS 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.