Load Specifications
Load data in caliber 7 mm STW with .284 | 160gr | Prvi Partizan PSP BT 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% | 58,175 psi | 87% | 2858 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 58,494 psi | 88% | 2877 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 57,087 psi | 86% | 2959 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 88% | 59,364 psi | 89% | 2946 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 57,856 psi | 87% | 2959 fps | 99.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 60,365 psi | 90% | 2989 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 52,663 psi | 79% | 2963 fps | 96.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 54,694 psi | 82% | 2949 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 59,654 psi | 89% | 2933 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 58,856 psi | 88% | 2933 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 58,218 psi | 87% | 2956 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 59,915 psi | 90% | 2913 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 59,944 psi | 90% | 2982 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 56,869 psi | 85% | 2949 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 58,291 psi | 87% | 3018 fps | 98.1% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 58,407 psi | 88% | 2917 fps | 98.1% |
| Bofors RP15 | <<locked>> | 92% | 57,377 psi | 86% | 2940 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 59,814 psi | 90% | 2999 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 58,218 psi | 87% | 2956 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 59,524 psi | 89% | 2877 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 57,711 psi | 87% | 2953 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 59,930 psi | 90% | 2933 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 57,043 psi | 86% | 2894 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 90% | 59,872 psi | 90% | 2933 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 59,698 psi | 89% | 2854 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 59,117 psi | 89% | 3071 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,608 psi | 56% | 1847 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 58,073 psi | 87% | 2867 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 58,711 psi | 88% | 2867 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 57,334 psi | 86% | 2871 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 92% | 59,944 psi | 90% | 2999 fps | 99.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 50,154 psi | 75% | 2864 fps | 99.2% |
| Lovex S065 | <<locked>> | 82% | 58,276 psi | 87% | 2844 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 60,292 psi | 90% | 2894 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 59,611 psi | 89% | 2881 fps | 100% |
| Norma 204 | <<locked>> | 84% | 59,509 psi | 89% | 2927 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 50,952 psi | 76% | 2887 fps | 100% |
| Norma MRP | <<locked>> | 88% | 58,392 psi | 88% | 2972 fps | 100% |
| Norma URP | <<locked>> | 84% | 60,307 psi | 90% | 2910 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 57,188 psi | 86% | 2963 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 84% | 59,364 psi | 89% | 2923 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 60,002 psi | 90% | 2949 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,493 psi | 58% | 1890 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 58,711 psi | 88% | 2900 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 57,348 psi | 86% | 2930 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 55,999 psi | 84% | 3002 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 59,727 psi | 90% | 3028 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 88% | 59,988 psi | 90% | 2913 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 88% | 58,740 psi | 88% | 2927 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 59,524 psi | 89% | 2877 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 58,276 psi | 87% | 2844 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 60,292 psi | 90% | 2894 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 57,261 psi | 86% | 2799 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 58,320 psi | 87% | 2923 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 57,856 psi | 87% | 2851 fps | 99.3% |
| Somchem S365 | <<locked>> | 84% | 58,015 psi | 87% | 2864 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 59,030 psi | 88% | 2894 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 58,088 psi | 87% | 2848 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 58,914 psi | 88% | 2881 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 58,102 psi | 87% | 2897 fps | 96.4% |
| Vihtavuori N550 | <<locked>> | 82% | 57,421 psi | 86% | 2854 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 58,015 psi | 87% | 2890 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 57,856 psi | 87% | 2972 fps | 99.5% |
| Vihtavuori N565 | <<locked>> | 94% | 58,421 psi | 88% | 2956 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 98% | 60,031 psi | 90% | 3028 fps | 99.3% |
| Vihtavuori N570 | <<locked>> | 98% | 57,116 psi | 86% | 3022 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 57,609 psi | 86% | 2799 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 59,930 psi | 90% | 2933 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 60,162 psi | 90% | 3002 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 58,972 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% | 41,524 psi | 62% | 2592 fps | 99.6% |
| Accurate 4350 | <<locked>> | 80% | 54,723 psi | 82% | 2825 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 42,888 psi | 64% | 2707 fps | 96.1% |
| ADI AR 2209 | <<locked>> | 80% | 45,411 psi | 68% | 2717 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 80% | 40,785 psi | 61% | 2654 fps | 96.7% |
| ADI AR 2217 | <<locked>> | 86% | 37,173 psi | 56% | 2569 fps | 95.8% |
| ADI AR 2218 | <<locked>> | 98% | 48,820 psi | 73% | 2887 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 82% | 29,733 psi | 45% | 2415 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 52,315 psi | 78% | 2831 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,455 psi | 68% | 2710 fps | 98.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 41,466 psi | 62% | 2661 fps | 98.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 40,263 psi | 60% | 2612 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,664 psi | 52% | 2539 fps | 99.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 45,339 psi | 68% | 2769 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 46,456 psi | 70% | 2815 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 45,266 psi | 68% | 2684 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 38,624 psi | 58% | 2598 fps | 97.1% |
| Bofors RP30 | <<locked>> | 84% | 37,159 psi | 56% | 2589 fps | 96% |
| Bofors RP5 | <<locked>> | 80% | 41,466 psi | 62% | 2661 fps | 98.1% |
| Bofors RP7 | <<locked>> | 80% | 55,883 psi | 84% | 2825 fps | 100% |
| Hodgdon H1000 | <<locked>> | 82% | 35,404 psi | 53% | 2526 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 80% | 56,028 psi | 84% | 2881 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 43,337 psi | 65% | 2654 fps | 96.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 42,612 psi | 64% | 2641 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 49,066 psi | 74% | 2703 fps | 100% |
| Hodgdon Retumbo | 65.8 gr | 80% | 33,852 psi | 51% | 2566 fps | 96.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,253 psi | 42% | 1654 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 51,082 psi | 77% | 2759 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 51,677 psi | 77% | 2769 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 44,498 psi | 67% | 2651 fps | 97.3% |
| IMR 7828 SSC | <<locked>> | 80% | 39,537 psi | 59% | 2635 fps | 96.3% |
| IMR 8133 Enduron | <<locked>> | 90% | 35,563 psi | 53% | 2569 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 54,781 psi | 82% | 2795 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 53,243 psi | 80% | 2792 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 35,694 psi | 54% | 2470 fps | 98.6% |
| Norma 204 | <<locked>> | 80% | 51,895 psi | 78% | 2812 fps | 99.5% |
| Norma 217 | <<locked>> | 86% | 31,154 psi | 47% | 2470 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 43,874 psi | 66% | 2730 fps | 99.4% |
| Norma URP | <<locked>> | 80% | 53,069 psi | 80% | 2808 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 39,450 psi | 59% | 2644 fps | 96.7% |
| Ramshot Hunter | <<locked>> | 80% | 51,938 psi | 78% | 2812 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 35,346 psi | 53% | 2523 fps | 97.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,935 psi | 43% | 1693 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 54,824 psi | 82% | 2848 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 53,461 psi | 80% | 2871 fps | 100% |
| ReloadSwiss RS 76 | 70.5 gr | 80% | 33,127 psi | 50% | 2543 fps | 97.2% |
| ReloadSwiss RS 80 | 78.1 gr | 88% | 40,683 psi | 61% | 2694 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 46,456 psi | 70% | 2694 fps | 98.2% |
| Rottweil R 905 | <<locked>> | 80% | 45,005 psi | 67% | 2700 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 80% | 55,883 psi | 84% | 2825 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 54,781 psi | 82% | 2795 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 53,243 psi | 80% | 2792 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,519 psi | 80% | 2743 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,672 psi | 67% | 2697 fps | 98.8% |
| Somchem S361 | <<locked>> | 80% | 47,427 psi | 71% | 2684 fps | 97.8% |
| Somchem S365 | <<locked>> | 80% | 50,633 psi | 76% | 2762 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 45,455 psi | 68% | 2677 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 54,491 psi | 82% | 2799 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 39,653 psi | 59% | 2556 fps | 98.1% |
| Vihtavuori N170 | <<locked>> | 94% | 54,302 psi | 81% | 2835 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 53,751 psi | 81% | 2805 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 44,701 psi | 67% | 2687 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 43,642 psi | 65% | 2723 fps | 97% |
| Vihtavuori N565 | <<locked>> | 82% | 38,754 psi | 58% | 2598 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 88% | 42,047 psi | 63% | 2713 fps | 95.5% |
| Vihtavuori N570 | <<locked>> | 94% | 49,443 psi | 74% | 2890 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 53,911 psi | 81% | 2749 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 56,231 psi | 84% | 2884 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 37,869 psi | 57% | 2657 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 41,829 psi | 63% | 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 | Prvi Partizan PSP BT. Hodgdon Retumbo delivers the highest muzzle velocity at 3,071 fps; across all powders the maximum-charge window runs from 1,847 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 1:11.5 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, ReloadSwiss RS 80 rank at the top here: for 7 mm STW with the .284 | 160gr | 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.