Load Specifications
Load data in caliber 7 mm STW with .284 | 140gr | Prvi Partizan PSP BT bullet and 72 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 Vihtavuori N560.
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>> | 92% | 57,276 psi | 86% | 3009 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 58,030 psi | 87% | 3045 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 56,173 psi | 84% | 3104 fps | 98% |
| ADI AR 2209 | <<locked>> | 90% | 59,016 psi | 88% | 3104 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 92% | 57,058 psi | 86% | 3110 fps | 99% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 55,216 psi | 83% | 3068 fps | 99.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 49,632 psi | 74% | 3022 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 86% | 58,972 psi | 88% | 3100 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 60,133 psi | 90% | 3110 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 58,479 psi | 88% | 3091 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 92% | 57,334 psi | 86% | 3104 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 94% | 58,740 psi | 88% | 3071 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 58,711 psi | 88% | 3136 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 59,988 psi | 90% | 3166 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 58,218 psi | 87% | 3061 fps | 97% |
| Bofors RP15 | <<locked>> | 96% | 60,220 psi | 90% | 3146 fps | 99.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 58,508 psi | 88% | 3143 fps | 99.5% |
| Bofors RP5 | <<locked>> | 92% | 57,334 psi | 86% | 3104 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 59,480 psi | 89% | 3041 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 98% | 56,826 psi | 85% | 3094 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 84% | 59,509 psi | 89% | 3100 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 57,798 psi | 87% | 3051 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 90% | 56,594 psi | 85% | 3041 fps | 98.4% |
| Hodgdon H4831 SC | <<locked>> | 92% | 59,437 psi | 89% | 3087 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 59,088 psi | 89% | 3018 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 57,595 psi | 86% | 3219 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 56,347 psi | 84% | 3071 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,347 psi | 56% | 1965 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 57,711 psi | 87% | 3025 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 82% | 57,159 psi | 86% | 3009 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 58,262 psi | 87% | 3031 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 57,290 psi | 86% | 3025 fps | 98.6% |
| IMR 7828 SSC | <<locked>> | 94% | 58,958 psi | 88% | 3150 fps | 99.3% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 45,208 psi | 68% | 2923 fps | 97.1% |
| Lovex S065 | <<locked>> | 84% | 57,972 psi | 87% | 3005 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 60,176 psi | 90% | 3061 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 58,682 psi | 88% | 3028 fps | 100% |
| Norma 204 | <<locked>> | 86% | 59,321 psi | 89% | 3087 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 45,629 psi | 68% | 2949 fps | 99.1% |
| Norma MRP | <<locked>> | 90% | 57,290 psi | 86% | 3123 fps | 100% |
| Norma URP | <<locked>> | 86% | 59,973 psi | 90% | 3077 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 60,365 psi | 90% | 3169 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 86% | 58,972 psi | 88% | 3084 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 59,001 psi | 88% | 3097 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,130 psi | 57% | 2008 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 58,175 psi | 87% | 3064 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 56,579 psi | 85% | 3087 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 58,784 psi | 88% | 3209 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 58,465 psi | 88% | 3166 fps | 98.7% |
| Rottweil R 904 | <<locked>> | 90% | 59,683 psi | 89% | 3071 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 90% | 58,044 psi | 87% | 3081 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 84% | 59,480 psi | 89% | 3041 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,972 psi | 87% | 3005 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 60,176 psi | 90% | 3061 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 60,089 psi | 90% | 2897 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 57,217 psi | 86% | 2959 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 57,609 psi | 86% | 3074 fps | 99.7% |
| Somchem S361 | <<locked>> | 88% | 57,754 psi | 87% | 3002 fps | 98.6% |
| Somchem S365 | <<locked>> | 86% | 57,058 psi | 86% | 3025 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 58,566 psi | 88% | 3051 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 58,233 psi | 87% | 2949 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 57,856 psi | 87% | 3015 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 58,305 psi | 87% | 3031 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 84% | 57,072 psi | 86% | 3018 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 57,058 psi | 86% | 3048 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 56,855 psi | 85% | 3117 fps | 98.6% |
| Vihtavuori N565 | <<locked>> | 96% | 57,334 psi | 86% | 3100 fps | 98.9% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 58,842 psi | 88% | 3166 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 57,493 psi | 86% | 2963 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 59,698 psi | 89% | 3100 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 58,131 psi | 87% | 3159 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 58,668 psi | 88% | 3045 fps | 99.7% |
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% | 37,985 psi | 57% | 2661 fps | 98.1% |
| Accurate 4350 | <<locked>> | 80% | 50,430 psi | 76% | 2927 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 45,281 psi | 68% | 2900 fps | 95.3% |
| ADI AR 2209 | <<locked>> | 80% | 41,989 psi | 63% | 2795 fps | 96.8% |
| ADI AR 2213 | <<locked>> | 84% | 43,062 psi | 65% | 2848 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 92% | 41,887 psi | 63% | 2812 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 88% | 33,156 psi | 50% | 2641 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 48,211 psi | 72% | 2933 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 56,144 psi | 84% | 3051 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,945 psi | 63% | 2789 fps | 96.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,985 psi | 57% | 2730 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,622 psi | 55% | 2690 fps | 99.9% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,705 psi | 48% | 2595 fps | 96.7% |
| Alliant Reloder-26 | <<locked>> | 80% | 40,814 psi | 61% | 2841 fps | 99.6% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 51,198 psi | 77% | 2940 fps | 95.3% |
| Bofors RP15 | <<locked>> | 82% | 37,811 psi | 57% | 2723 fps | 95.4% |
| Bofors RP30 | <<locked>> | 88% | 38,595 psi | 58% | 2762 fps | 95% |
| Bofors RP5 | <<locked>> | 80% | 37,985 psi | 57% | 2730 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 52,330 psi | 78% | 2930 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 88% | 39,929 psi | 60% | 2772 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 80% | 52,040 psi | 78% | 2979 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 80% | 54,302 psi | 81% | 2995 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 82% | 42,917 psi | 64% | 2792 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 84% | 45,092 psi | 68% | 2835 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,498 psi | 68% | 2812 fps | 100% |
| Hodgdon Retumbo | 70.3 gr | 84% | 35,389 psi | 53% | 2740 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 52,431 psi | 79% | 3009 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,007 psi | 42% | 1762 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,790 psi | 72% | 2858 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,577 psi | 80% | 2953 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 47,790 psi | 72% | 2867 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 44,222 psi | 66% | 2789 fps | 95.8% |
| IMR 7828 SSC | <<locked>> | 84% | 41,655 psi | 62% | 2828 fps | 95.5% |
| IMR 8133 Enduron | <<locked>> | 96% | 39,320 psi | 59% | 2795 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 51,256 psi | 77% | 2900 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 49,661 psi | 74% | 2890 fps | 99.6% |
| Lovex S071 | <<locked>> | 80% | 32,663 psi | 49% | 2533 fps | 96.3% |
| Norma 204 | <<locked>> | 80% | 48,182 psi | 72% | 2897 fps | 98.2% |
| Norma 217 | <<locked>> | 92% | 34,519 psi | 52% | 2697 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 39,943 psi | 60% | 2799 fps | 97.7% |
| Norma URP | <<locked>> | 80% | 49,168 psi | 74% | 2910 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 41,495 psi | 62% | 2831 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 48,138 psi | 72% | 2907 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 82% | 34,606 psi | 52% | 2638 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,616 psi | 43% | 1804 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 50,560 psi | 76% | 2946 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 48,936 psi | 73% | 2969 fps | 100% |
| ReloadSwiss RS 76 | 75.3 gr | 84% | 34,809 psi | 52% | 2717 fps | 96.3% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 46,050 psi | 69% | 2946 fps | 95.9% |
| Rottweil R 904 | <<locked>> | 80% | 43,149 psi | 65% | 2776 fps | 96.1% |
| Rottweil R 905 | <<locked>> | 80% | 41,379 psi | 62% | 2776 fps | 96.8% |
| Rottweil R 907 | <<locked>> | 80% | 52,330 psi | 78% | 2930 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 51,256 psi | 77% | 2900 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 49,661 psi | 74% | 2890 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 56,463 psi | 85% | 2851 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 50,270 psi | 75% | 2848 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 41,031 psi | 62% | 2769 fps | 96.7% |
| Somchem S361 | <<locked>> | 80% | 44,092 psi | 66% | 2762 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 46,615 psi | 70% | 2867 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 42,061 psi | 63% | 2759 fps | 97.8% |
| Vihtavuori N150 | <<locked>> | 80% | 54,491 psi | 82% | 2897 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 50,546 psi | 76% | 2904 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,405 psi | 55% | 2625 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 50,067 psi | 75% | 2907 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,886 psi | 61% | 2769 fps | 99.8% |
| Vihtavuori N560 | 71.3 gr | 82% | 42,975 psi | 64% | 2854 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 88% | 43,555 psi | 65% | 2848 fps | 95.9% |
| Vihtavuori N568 | <<locked>> | 94% | 47,123 psi | 71% | 2959 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,995 psi | 75% | 2858 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 52,040 psi | 78% | 2979 fps | 99.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 33,359 psi | 50% | 2713 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,566 psi | 58% | 2680 fps | 95.8% |
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 72 powders for 7 mm STW loaded with the .284 | 140gr | Prvi Partizan PSP BT. Hodgdon Retumbo delivers the highest muzzle velocity at 3,219 fps; across all powders the maximum-charge window runs from 1,965 fps to 3,219 fps. ADI AR 2217 gives the best case fill at 100 %, and 72 of the 72 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 140.0 gr projectile in 0.284" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Bofors RP30 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, Vihtavuori N560 rank at the top here: for 7 mm STW with the .284 | 140gr | Prvi Partizan PSP BT 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.