Load Specifications
Load data in caliber 7 mm STW with .284 | 150gr | Norma Soft Point 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 Alliant Reloder-25.
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% | 56,565 psi | 85% | 2917 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 56,927 psi | 85% | 2940 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 59,364 psi | 89% | 3074 fps | 99% |
| ADI AR 2209 | <<locked>> | 88% | 57,856 psi | 87% | 3005 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 92% | 60,220 psi | 90% | 3074 fps | 99.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 58,668 psi | 88% | 3045 fps | 99.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 53,011 psi | 79% | 3002 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 58,073 psi | 87% | 2995 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 57,392 psi | 86% | 2989 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 90% | 56,507 psi | 85% | 3009 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 92% | 58,175 psi | 87% | 2972 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 58,363 psi | 87% | 3045 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 59,408 psi | 89% | 3068 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 56,318 psi | 84% | 3061 fps | 97.2% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 57,145 psi | 86% | 2969 fps | 97.5% |
| Bofors RP15 | <<locked>> | 94% | 59,596 psi | 89% | 3054 fps | 99.9% |
| Bofors RP30 | <<locked>> | 98% | 58,146 psi | 87% | 3051 fps | 99.7% |
| Bofors RP5 | <<locked>> | 90% | 56,507 psi | 85% | 3009 fps | 99.8% |
| Bofors RP7 | <<locked>> | 82% | 58,276 psi | 87% | 2943 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 56,144 psi | 84% | 3005 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 82% | 58,349 psi | 87% | 2995 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 59,466 psi | 89% | 3005 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 90% | 58,247 psi | 87% | 2989 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 58,131 psi | 87% | 2917 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 57,305 psi | 86% | 3127 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 59,596 psi | 89% | 3035 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,434 psi | 56% | 1906 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 56,681 psi | 85% | 2927 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 59,480 psi | 89% | 2959 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 57,174 psi | 86% | 2930 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 59,814 psi | 90% | 2986 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 92% | 58,305 psi | 87% | 3054 fps | 99.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 48,370 psi | 73% | 2907 fps | 98.5% |
| Lovex S065 | <<locked>> | 82% | 56,855 psi | 85% | 2904 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 58,871 psi | 88% | 2956 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 58,146 psi | 87% | 2936 fps | 100% |
| Norma 204 | <<locked>> | 84% | 58,102 psi | 87% | 2986 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 49,226 psi | 74% | 2933 fps | 99.8% |
| Norma MRP | <<locked>> | 88% | 56,565 psi | 85% | 3025 fps | 100% |
| Norma URP | <<locked>> | 84% | 58,813 psi | 88% | 2972 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 59,901 psi | 90% | 3081 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 84% | 57,943 psi | 87% | 2982 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 58,233 psi | 87% | 3005 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,450 psi | 58% | 1952 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 57,203 psi | 86% | 2963 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 60,002 psi | 90% | 3048 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 58,407 psi | 88% | 3117 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 57,812 psi | 87% | 3074 fps | 99.1% |
| Rottweil R 904 | <<locked>> | 88% | 58,639 psi | 88% | 2972 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 88% | 57,217 psi | 86% | 2986 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 82% | 58,276 psi | 87% | 2943 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 56,855 psi | 85% | 2904 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 58,871 psi | 88% | 2956 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 59,799 psi | 90% | 2917 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 56,811 psi | 85% | 2979 fps | 99.8% |
| Somchem S361 | <<locked>> | 88% | 60,365 psi | 90% | 2963 fps | 99.3% |
| Somchem S365 | <<locked>> | 86% | 60,365 psi | 90% | 2979 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 57,522 psi | 86% | 2949 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 56,652 psi | 85% | 2910 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 57,522 psi | 86% | 2936 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 59,727 psi | 90% | 2969 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 60,162 psi | 90% | 3002 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 60,249 psi | 90% | 3091 fps | 99.5% |
| Vihtavuori N565 | <<locked>> | 94% | 56,898 psi | 85% | 3012 fps | 99.3% |
| Vihtavuori N568 | <<locked>> | 98% | 58,349 psi | 87% | 3077 fps | 98.7% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 59,495 psi | 89% | 3140 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 60,220 psi | 90% | 2913 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 58,581 psi | 88% | 2999 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 57,928 psi | 87% | 3061 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 57,508 psi | 86% | 2949 fps | 99.8% |
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% | 40,335 psi | 60% | 2638 fps | 99.2% |
| Accurate 4350 | <<locked>> | 80% | 53,330 psi | 80% | 2887 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 41,640 psi | 62% | 2749 fps | 95% |
| ADI AR 2209 | <<locked>> | 80% | 44,251 psi | 66% | 2766 fps | 98.1% |
| ADI AR 2213 | <<locked>> | 80% | 39,653 psi | 59% | 2697 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 88% | 38,624 psi | 58% | 2667 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 84% | 30,821 psi | 46% | 2507 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 50,792 psi | 76% | 2890 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,295 psi | 66% | 2762 fps | 98.1% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,248 psi | 60% | 2707 fps | 97.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,928 psi | 58% | 2661 fps | 100% |
| Alliant Reloder-25 | 66.4 gr | 80% | 33,620 psi | 50% | 2579 fps | 98.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 43,830 psi | 66% | 2818 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 48,327 psi | 72% | 2923 fps | 95.1% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 47,210 psi | 71% | 2795 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 37,362 psi | 56% | 2638 fps | 96.1% |
| Bofors RP30 | <<locked>> | 86% | 38,508 psi | 58% | 2687 fps | 95.8% |
| Bofors RP5 | <<locked>> | 80% | 40,248 psi | 60% | 2707 fps | 97.2% |
| Bofors RP7 | <<locked>> | 80% | 54,563 psi | 82% | 2884 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 84% | 36,825 psi | 55% | 2628 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 54,592 psi | 82% | 2936 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 42,177 psi | 63% | 2703 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 41,481 psi | 62% | 2687 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,877 psi | 72% | 2766 fps | 100% |
| Hodgdon Retumbo | 68.8 gr | 82% | 35,157 psi | 53% | 2667 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 80% | 55,245 psi | 83% | 2969 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,108 psi | 42% | 1709 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,937 psi | 75% | 2818 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 55,956 psi | 84% | 2907 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 50,212 psi | 75% | 2825 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,468 psi | 65% | 2700 fps | 96.4% |
| IMR 7828 SSC | <<locked>> | 80% | 38,377 psi | 58% | 2677 fps | 95.2% |
| IMR 8133 Enduron | <<locked>> | 94% | 39,291 psi | 59% | 2723 fps | 96% |
| Lovex S065 | <<locked>> | 80% | 53,490 psi | 80% | 2854 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 51,880 psi | 78% | 2851 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 34,621 psi | 52% | 2510 fps | 97.8% |
| Norma 204 | <<locked>> | 80% | 50,575 psi | 76% | 2864 fps | 99.1% |
| Norma 217 | <<locked>> | 88% | 32,169 psi | 48% | 2562 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 42,627 psi | 64% | 2779 fps | 98.9% |
| Norma URP | <<locked>> | 80% | 51,605 psi | 77% | 2867 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 38,130 psi | 57% | 2684 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 50,604 psi | 76% | 2867 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 34,258 psi | 51% | 2562 fps | 96.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,747 psi | 43% | 1749 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 53,519 psi | 80% | 2907 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 51,779 psi | 78% | 2927 fps | 100% |
| ReloadSwiss RS 76 | 71.8 gr | 80% | 31,981 psi | 48% | 2569 fps | 95.8% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 42,482 psi | 64% | 2799 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 45,223 psi | 68% | 2743 fps | 97.4% |
| Rottweil R 905 | <<locked>> | 80% | 43,816 psi | 66% | 2749 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 80% | 54,563 psi | 82% | 2884 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,490 psi | 80% | 2854 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 51,880 psi | 78% | 2851 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,402 psi | 79% | 2805 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,482 psi | 65% | 2746 fps | 98.1% |
| Somchem S361 | <<locked>> | 80% | 46,195 psi | 69% | 2730 fps | 97% |
| Somchem S365 | <<locked>> | 80% | 49,240 psi | 74% | 2822 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,266 psi | 66% | 2726 fps | 98.9% |
| Vihtavuori N160 | <<locked>> | 80% | 53,214 psi | 80% | 2861 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,595 psi | 58% | 2602 fps | 97.3% |
| Vihtavuori N550 | <<locked>> | 80% | 52,460 psi | 79% | 2861 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,453 psi | 65% | 2740 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 42,453 psi | 64% | 2769 fps | 96% |
| Vihtavuori N565 | <<locked>> | 84% | 40,321 psi | 60% | 2703 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 90% | 43,656 psi | 65% | 2815 fps | 95.3% |
| Vihtavuori N570 | <<locked>> | 96% | 51,387 psi | 77% | 2999 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 52,460 psi | 79% | 2808 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 54,824 psi | 82% | 2940 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 36,245 psi | 54% | 2697 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,683 psi | 61% | 2654 fps | 97.3% |
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 | 150gr | Norma Soft Point. Vihtavuori N570 delivers the highest muzzle velocity at 3,140 fps; across all powders the maximum-charge window runs from 1,906 fps to 3,140 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 150.0 gr projectile in 0.284" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-33 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, Alliant Reloder-25 rank at the top here: for 7 mm STW with the .284 | 150gr | Norma Soft Point 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.