Load Specifications
Load data in caliber 7 mm STW with .284 | 180gr | Lapua ScenarL bullet and 65 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, Vihtavuori N570 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% | 56,811 psi | 85% | 2694 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 59,596 psi | 89% | 2854 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 86% | 57,841 psi | 87% | 2776 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 60,365 psi | 90% | 2848 fps | 100% |
| ADI AR 2217 | <<locked>> | 98% | 58,972 psi | 88% | 2825 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 55,230 psi | 83% | 2881 fps | 98.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 57,551 psi | 86% | 2841 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 58,233 psi | 87% | 2756 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 57,479 psi | 86% | 2766 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 56,753 psi | 85% | 2785 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 58,624 psi | 88% | 2743 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 59,001 psi | 88% | 2815 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 59,538 psi | 89% | 2831 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 56,840 psi | 85% | 2861 fps | 98.6% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 52,156 psi | 78% | 2782 fps | 97.3% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 56,898 psi | 85% | 2756 fps | 98.7% |
| Bofors RP15 | <<locked>> | 92% | 59,814 psi | 90% | 2825 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 58,610 psi | 88% | 2835 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 56,753 psi | 85% | 2785 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 56,507 psi | 85% | 2789 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 59,408 psi | 89% | 2782 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 88% | 58,160 psi | 87% | 2766 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 58,291 psi | 87% | 2680 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 58,160 psi | 87% | 2904 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,739 psi | 57% | 1736 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 60,220 psi | 90% | 2746 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 57,159 psi | 86% | 2697 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 59,538 psi | 89% | 2756 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 90% | 58,552 psi | 88% | 2828 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 94% | 58,088 psi | 87% | 2707 fps | 95.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 52,837 psi | 79% | 2772 fps | 99.9% |
| Lovex S065 | <<locked>> | 82% | 60,307 psi | 90% | 2717 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 58,813 psi | 88% | 2723 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 58,523 psi | 88% | 2713 fps | 100% |
| Norma 204 | <<locked>> | 82% | 57,667 psi | 86% | 2753 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 53,925 psi | 81% | 2792 fps | 100% |
| Norma MRP | <<locked>> | 86% | 56,855 psi | 85% | 2799 fps | 100% |
| Norma URP | <<locked>> | 82% | 58,914 psi | 88% | 2736 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 60,205 psi | 90% | 2854 fps | 100% |
| Ramshot Hunter | <<locked>> | 82% | 57,696 psi | 86% | 2746 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 58,494 psi | 88% | 2782 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,696 psi | 58% | 1775 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 59,785 psi | 90% | 2805 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 59,234 psi | 89% | 2894 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 58,262 psi | 87% | 2864 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 86% | 58,320 psi | 87% | 2743 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 86% | 57,334 psi | 86% | 2756 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 60,307 psi | 90% | 2717 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 58,813 psi | 88% | 2723 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 59,146 psi | 89% | 2677 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 56,942 psi | 85% | 2756 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 59,959 psi | 90% | 2740 fps | 99.9% |
| Somchem S365 | <<locked>> | 82% | 56,637 psi | 85% | 2690 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 57,551 psi | 86% | 2726 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 57,450 psi | 86% | 2713 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 56,637 psi | 85% | 2740 fps | 97.2% |
| Vihtavuori N550 | <<locked>> | 82% | 59,625 psi | 89% | 2733 fps | 100% |
| Vihtavuori N555 | <<locked>> | 86% | 56,913 psi | 85% | 2723 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 56,304 psi | 84% | 2802 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 92% | 57,072 psi | 86% | 2795 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 96% | 58,740 psi | 88% | 2864 fps | 99.6% |
| Vihtavuori N570 | <<locked>> | 98% | 60,017 psi | 90% | 2927 fps | 98.8% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 59,727 psi | 90% | 2674 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 58,856 psi | 88% | 2831 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 57,348 psi | 86% | 2723 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% | 43,453 psi | 65% | 2493 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 44,933 psi | 67% | 2615 fps | 97.8% |
| ADI AR 2209 | <<locked>> | 80% | 47,326 psi | 71% | 2612 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 80% | 42,728 psi | 64% | 2562 fps | 98.2% |
| ADI AR 2217 | <<locked>> | 82% | 34,127 psi | 51% | 2375 fps | 95.9% |
| ADI AR 2218 | <<locked>> | 94% | 44,367 psi | 67% | 2674 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 80% | 29,153 psi | 44% | 2287 fps | 96.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 54,621 psi | 82% | 2707 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 47,355 psi | 71% | 2608 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 43,482 psi | 65% | 2569 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 42,163 psi | 63% | 2507 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 36,448 psi | 55% | 2451 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 47,819 psi | 72% | 2667 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 42,105 psi | 63% | 2605 fps | 95% |
| Alliant Reloder-50 | <<locked>> | 96% | 45,107 psi | 68% | 2657 fps | 95.5% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 41,307 psi | 62% | 2480 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 40,437 psi | 61% | 2507 fps | 98.6% |
| Bofors RP30 | <<locked>> | 80% | 34,069 psi | 51% | 2392 fps | 96% |
| Bofors RP5 | <<locked>> | 80% | 43,482 psi | 65% | 2569 fps | 99.2% |
| Hodgdon H1000 | <<locked>> | 80% | 34,577 psi | 52% | 2388 fps | 96.7% |
| Hodgdon H4831 | <<locked>> | 80% | 45,295 psi | 68% | 2559 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 80% | 44,512 psi | 67% | 2546 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 51,140 psi | 77% | 2585 fps | 100% |
| Hodgdon Retumbo | 63 gr | 80% | 35,607 psi | 53% | 2493 fps | 98.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,311 psi | 42% | 1552 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 52,953 psi | 79% | 2644 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 53,722 psi | 81% | 2651 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 46,151 psi | 69% | 2546 fps | 98.5% |
| IMR 7828 SSC | <<locked>> | 80% | 41,495 psi | 62% | 2546 fps | 98% |
| IMR 7977 Enduron | <<locked>> | 92% | 54,360 psi | 81% | 2651 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 86% | 32,735 psi | 49% | 2379 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 56,565 psi | 85% | 2667 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 55,143 psi | 83% | 2674 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 37,492 psi | 56% | 2379 fps | 99.6% |
| Norma 204 | <<locked>> | 80% | 53,969 psi | 81% | 2700 fps | 100% |
| Norma 217 | <<locked>> | 82% | 28,790 psi | 43% | 2290 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 46,064 psi | 69% | 2631 fps | 100% |
| Norma URP | <<locked>> | 80% | 55,143 psi | 83% | 2687 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 41,568 psi | 62% | 2559 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 80% | 54,027 psi | 81% | 2697 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 37,405 psi | 56% | 2441 fps | 98.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,051 psi | 44% | 1588 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 55,840 psi | 84% | 2753 fps | 100% |
| ReloadSwiss RS 76 | 67.5 gr | 80% | 34,940 psi | 52% | 2470 fps | 99% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 37,028 psi | 56% | 2490 fps | 95.5% |
| Rottweil R 904 | <<locked>> | 80% | 48,211 psi | 72% | 2589 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 80% | 46,934 psi | 70% | 2595 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 56,565 psi | 85% | 2667 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 55,143 psi | 83% | 2674 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 55,361 psi | 83% | 2628 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 46,586 psi | 70% | 2592 fps | 99.6% |
| Somchem S361 | <<locked>> | 80% | 49,211 psi | 74% | 2579 fps | 98.9% |
| Somchem S365 | <<locked>> | 80% | 52,910 psi | 79% | 2641 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 47,442 psi | 71% | 2575 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 80% | 41,423 psi | 62% | 2461 fps | 99.2% |
| Vihtavuori N170 | <<locked>> | 90% | 49,443 psi | 74% | 2625 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 55,724 psi | 84% | 2680 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 46,876 psi | 70% | 2579 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 45,745 psi | 69% | 2628 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 80% | 38,101 psi | 57% | 2461 fps | 96.7% |
| Vihtavuori N568 | <<locked>> | 84% | 38,247 psi | 57% | 2503 fps | 95.4% |
| Vihtavuori N570 | 73.6 gr | 90% | 45,107 psi | 68% | 2677 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 56,028 psi | 84% | 2631 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 40,364 psi | 61% | 2562 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 43,613 psi | 65% | 2510 fps | 99.2% |
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 65 powders for 7 mm STW loaded with the .284 | 180gr | Lapua ScenarL. Vihtavuori N570 delivers the highest muzzle velocity at 2,927 fps; across all powders the maximum-charge window runs from 1,736 fps to 2,927 fps. ADI AR 2218 gives the best case fill at 100 %, and 65 of the 65 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 180.0 gr projectile in 0.284" calls for a 1:9.5 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. Hodgdon Retumbo, Vihtavuori N570, ReloadSwiss RS 76 rank at the top here: for 7 mm STW with the .284 | 180gr | Lapua ScenarL 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.