Load Specifications
Load data in caliber 7 mm STW with .284 | 175gr | Alaska Bullet Works Kodiak PP SPBC bullet and 60 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N570, Hodgdon Retumbo and ReloadSwiss RS 76.
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>> | 88% | 57,914 psi | 87% | 2746 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 56,927 psi | 85% | 2851 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 86% | 59,088 psi | 89% | 2831 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 57,638 psi | 86% | 2848 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 96% | 56,391 psi | 85% | 2825 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 56,710 psi | 85% | 2940 fps | 98.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 59,408 psi | 89% | 2900 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 59,393 psi | 89% | 2812 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 58,639 psi | 88% | 2818 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 58,073 psi | 87% | 2841 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 60,031 psi | 90% | 2799 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 56,608 psi | 85% | 2822 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 56,927 psi | 85% | 2835 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 58,813 psi | 88% | 2923 fps | 98.8% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 54,186 psi | 81% | 2848 fps | 97.7% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 57,899 psi | 87% | 2808 fps | 98.8% |
| Bofors RP15 | <<locked>> | 90% | 57,493 psi | 86% | 2831 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 60,350 psi | 90% | 2894 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 58,073 psi | 87% | 2841 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 58,030 psi | 87% | 2848 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 56,579 psi | 85% | 2782 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 88% | 59,408 psi | 89% | 2822 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 59,335 psi | 89% | 2733 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 59,698 psi | 89% | 2959 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,782 psi | 57% | 1772 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 57,580 psi | 86% | 2753 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 58,363 psi | 87% | 2749 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 56,884 psi | 85% | 2759 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 90% | 60,118 psi | 90% | 2890 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 94% | 59,176 psi | 89% | 2762 fps | 96% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 54,230 psi | 81% | 2825 fps | 99.9% |
| Lovex S070 | <<locked>> | 82% | 59,756 psi | 90% | 2776 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 59,582 psi | 89% | 2766 fps | 100% |
| Norma 204 | <<locked>> | 82% | 58,929 psi | 88% | 2808 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 55,608 psi | 83% | 2848 fps | 100% |
| Norma MRP | <<locked>> | 86% | 58,175 psi | 87% | 2854 fps | 100% |
| Norma URP | <<locked>> | 82% | 59,901 psi | 90% | 2789 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 57,348 psi | 86% | 2854 fps | 100% |
| Ramshot Hunter | <<locked>> | 82% | 58,943 psi | 88% | 2802 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 59,915 psi | 90% | 2838 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,711 psi | 58% | 1814 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 56,536 psi | 85% | 2894 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 60,162 psi | 90% | 2927 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 86% | 59,524 psi | 89% | 2802 fps | 100% |
| Rottweil R 905 | <<locked>> | 86% | 58,566 psi | 88% | 2815 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 59,756 psi | 90% | 2776 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 60,220 psi | 90% | 2733 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 58,160 psi | 87% | 2812 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 57,159 psi | 86% | 2740 fps | 99.7% |
| Somchem S365 | <<locked>> | 82% | 57,943 psi | 87% | 2746 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 58,885 psi | 88% | 2782 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 58,842 psi | 88% | 2769 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 58,015 psi | 87% | 2795 fps | 97.4% |
| Vihtavuori N555 | <<locked>> | 86% | 58,044 psi | 87% | 2776 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 57,551 psi | 86% | 2861 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 92% | 58,552 psi | 88% | 2851 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 94% | 56,391 psi | 85% | 2864 fps | 99.4% |
| Vihtavuori N570 | <<locked>> | 96% | 57,711 psi | 87% | 2927 fps | 98.4% |
| Winchester StaBALL HD | <<locked>> | 88% | 56,507 psi | 85% | 2838 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 58,755 psi | 88% | 2782 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% | 44,396 psi | 67% | 2543 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 46,093 psi | 69% | 2671 fps | 97.9% |
| ADI AR 2209 | <<locked>> | 80% | 48,327 psi | 72% | 2664 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 80% | 43,642 psi | 65% | 2615 fps | 98.3% |
| ADI AR 2217 | <<locked>> | 82% | 34,867 psi | 52% | 2425 fps | 96.1% |
| ADI AR 2218 | <<locked>> | 94% | 45,513 psi | 68% | 2733 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 80% | 29,849 psi | 45% | 2336 fps | 97% |
| Alliant Reloder-16 | <<locked>> | 80% | 55,622 psi | 83% | 2762 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 48,283 psi | 72% | 2661 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 44,411 psi | 67% | 2618 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 43,221 psi | 65% | 2556 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 37,362 psi | 56% | 2503 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 49,110 psi | 74% | 2720 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 43,526 psi | 65% | 2661 fps | 95.4% |
| Alliant Reloder-50 | <<locked>> | 96% | 46,499 psi | 70% | 2710 fps | 95.7% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 41,989 psi | 63% | 2530 fps | 95.1% |
| Bofors RP15 | <<locked>> | 80% | 41,379 psi | 62% | 2559 fps | 98.7% |
| Bofors RP30 | <<locked>> | 80% | 34,954 psi | 52% | 2441 fps | 96.2% |
| Bofors RP5 | <<locked>> | 80% | 44,411 psi | 67% | 2618 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 80% | 35,331 psi | 53% | 2438 fps | 96.9% |
| Hodgdon H4831 | <<locked>> | 80% | 46,137 psi | 69% | 2612 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 45,368 psi | 68% | 2598 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 52,301 psi | 78% | 2641 fps | 100% |
| Hodgdon Retumbo | 65.6 gr | 80% | 36,506 psi | 55% | 2543 fps | 98.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,384 psi | 43% | 1585 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 53,882 psi | 81% | 2700 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 54,781 psi | 82% | 2703 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 47,007 psi | 70% | 2598 fps | 98.6% |
| IMR 7828 SSC | <<locked>> | 80% | 42,467 psi | 64% | 2598 fps | 98.1% |
| IMR 7977 Enduron | <<locked>> | 92% | 55,521 psi | 83% | 2707 fps | 95.2% |
| IMR 8133 Enduron | <<locked>> | 86% | 33,750 psi | 51% | 2431 fps | 95.5% |
| Lovex S070 | <<locked>> | 80% | 56,173 psi | 84% | 2726 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 38,218 psi | 57% | 2428 fps | 99.6% |
| Norma 204 | <<locked>> | 80% | 55,013 psi | 82% | 2753 fps | 100% |
| Norma 217 | <<locked>> | 82% | 29,588 psi | 44% | 2339 fps | 96% |
| Norma MRP | <<locked>> | 80% | 47,181 psi | 71% | 2687 fps | 100% |
| Norma URP | <<locked>> | 80% | 56,231 psi | 84% | 2743 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 42,670 psi | 64% | 2612 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 80% | 55,129 psi | 83% | 2749 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 38,363 psi | 57% | 2493 fps | 98.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,109 psi | 44% | 1624 fps | 100% |
| ReloadSwiss RS 76 | 70.3 gr | 80% | 35,911 psi | 54% | 2523 fps | 99.1% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 38,276 psi | 57% | 2543 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 80% | 49,153 psi | 74% | 2641 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 80% | 47,964 psi | 72% | 2651 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 56,173 psi | 84% | 2726 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 56,289 psi | 84% | 2677 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 47,616 psi | 71% | 2648 fps | 99.7% |
| Somchem S361 | <<locked>> | 80% | 50,212 psi | 75% | 2635 fps | 99% |
| Somchem S365 | <<locked>> | 80% | 54,027 psi | 81% | 2694 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 48,327 psi | 72% | 2628 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 80% | 42,293 psi | 63% | 2513 fps | 99.3% |
| Vihtavuori N170 | <<locked>> | 90% | 50,517 psi | 76% | 2680 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 80% | 47,805 psi | 72% | 2631 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 46,804 psi | 70% | 2680 fps | 98.6% |
| Vihtavuori N565 | <<locked>> | 80% | 39,073 psi | 59% | 2513 fps | 96.9% |
| Vihtavuori N568 | <<locked>> | 84% | 39,407 psi | 59% | 2559 fps | 95.6% |
| Vihtavuori N570 | 76.6 gr | 90% | 46,369 psi | 70% | 2733 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 41,640 psi | 62% | 2615 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 44,599 psi | 67% | 2562 fps | 99.3% |
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 60 powders for 7 mm STW loaded with the .284 | 175gr | Alaska Bullet Works Kodiak PP SPBC. Hodgdon Retumbo delivers the highest muzzle velocity at 2,959 fps; across all powders the maximum-charge window runs from 1,772 fps to 2,959 fps. ADI AR 2218 gives the best case fill at 100 %, and 60 of the 60 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (460 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 175.0 gr projectile in 0.284" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. ADI AR 2218, ADI AR 2225, Alliant Reloder-50 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. Vihtavuori N570, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for 7 mm STW with the .284 | 175gr | Alaska Bullet Works Kodiak PP SPBC 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.